"What is the evidence, and what does it mean?" Bill JamesEquivalent Average, R27, Age, On-Base Percentage and Slugging Percentage for every 1982 Blue Jay (and American League leaders).
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The 1982 Toronto Blue Jays
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Games Played By Position:
First Base: Willie Upshaw 155, John Mayberry 4, Dave Revering 4
Second Base: Damaso Garcia 141, Garth Iorg 30
Shortstop: Alfredo Griffin 162, Rance Mulliniks 16
Third Base: Rance Mulliniks 102, Garth Iorg 100, Barry Bonnell 9,
Dave Baker 8, Geno Petralli 3, Pedro Hernandez 2
Outfield: Lloyd Moseby 145, Jesse Barfield 137, Barry Bonnell 125,
Hosken Powell 75, Al Woods 64, Tony Johnson 28,
Leon Roberts 16, Wayne Nordhagen 10, Dick Davis 1,
Pedro Hernandez 1
Catcher: Ernie Whitt 98, Buck Martinez 93, Geno Petralli 12
Starting Pitcher: Jim Clancy 40, Dave Stieb 38, Luis Leal 38, Jim Gott 23,
Mark Bomback 8, Mark Eichhorn 7, Jerry Garvin 4,
Roy Lee Jackson 2, Dave Geisel 2
Relief Pitcher: Dale Murray 56, Roy Lee Jackson 46, Joey McLaughlin 44,
Jerry Garvin 28, Dave Geisel 14, Steve Senteney 11,
Mark Bomback 8, Jim Gott 7, Ken Schrom 6
Designated Hitter: Wayne Nordhagen 60, Dave Revering 49, Tony Johnson 28,
Glenn Adams 27, Otto Velez 24, Leon Roberts 21,
Hosken Powell 19, John Mayberry 13, Al Woods 10,
Barry Bonnell 6, Willie Upshaw 5, Damaso Garcia 4,
Pedro Hernandez 3, Jesse Barfield 1, Ernie Whitt 1,
Dick Davis 1, Garth Iorg 1
Manager: Bobby Cox
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1982 in Context
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Bobby Cox and his knack for fielding a great pitching staff led the '82 Jays
to their best record ever. The Brewers beat the Angels in the ALCS, but lost
to the Cards in the Series:
Runs Scored Per 9 IP Runs Allowed Per 9 IP Winning Percentage
( 1) Milwaukee 5.47 | ( 1) California 4.12 | ( 1) Milwaukee 95-67 .586
( 2) California 5.00 | ( 2) Baltimore 4.23 | ( 2) Baltimore 94-68 .580
( 3) Kansas City 4.93 | ( 3) Detroit 4.25 | ( 3) California 93-69 .574
( 4) White Sox 4.92 | ( 4) Seattle 4.34 | ( 4) Kansas City 90-72 .556
( 5) Baltimore 4.76 | ( 5) TORONTO 4.37 | ( 5) Boston 89-73 .549
( 6) Boston 4.66 | ( 6) Milwaukee 4.40 | ( 6) White Sox 87-75 .537
( 7) Detroit 4.52 | ( 7) Boston 4.42 | ( 7) Detroit 83-79 .512
( 8) NYYankees 4.37 | ( 8) NYYankees 4.42 | ( 8) NYYankees 79-83 .488
( 9) Oakland 4.27 | ( 9) White Sox 4.44 | ( 9) TORONTO 78-84 .481
(10) Cleveland 4.19 | (10) Kansas City 4.51 | ( 9) Cleveland 78-84 .481
(11) Minnesota 4.13 | (11) Cleveland 4.58 | (11) Seattle 76-86 .469
(12) TORONTO 4.06 | (12) Texas 4.71 | (12) Oakland 68-94 .420
(13) Seattle 3.97 | (13) Oakland 5.06 | (13) Texas 64-98 .395
(14) Texas 3.71 | (14) Minnesota 5.14 | (14) Minnesota 60-102 .370
Avg 4.50 Avg 4.50 1134-1134
Correcting the above for park factor, the '82 Jays still had the worst hitting
in the league, while the Brewers had an awesome team EqA of .289:
Team Equivalent Average:
1 2 3 4 5 6 7 8 9 10 11 12 13 14
MIL CAL CHW KAN BAL DET NYY OAK BOS CLE MIN TEX SEA TOR
.289 .272 .270 .270 .267 .261 .259 .259 .258 .253 .248 .246 .244 .241
Correcting runs allowed for park factor, the '82 Jays had the *best* pitching
& defense in the league. I didn't know the '82 pitching was this good before
embarking on this project:
Opponents' Equivalent Average:
1 2 3 4 5 6 7 8 9 10 11 12 13 14
TOR CAL BOS SEA DET BAL CHW NYY KAN CLE MIL TEX MIN OAK
.248 .251 .252 .253 .254 .254 .259 .260 .260 .262 .265 .271 .271 .277
Exhibition Stadium was rated the park most favorable to hitters (and least
favorable to pitchers) in 1982. Harvey's Wallbangers played in the toughest
hitters' park:
Park Factors ((PF-1)*100, hitters' parks first):
1 2 3 3 5 5 5 5 9 9 11 12 13 14
TOR BOS MIN SEA KAN CAL DET CLE CHW BAL NYY OAK TEX MIL
9.3 5.8 3.3 3.3 -.2 -.2 -.2 -.2 -.7 -.7 -2.2 -4.2 -5.2 -6.7
(derived from park factors in Total Baseball, 5th ed., which are based
on data from 1981-1983 except when the park changed; see Glossary)
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'82 Hitters
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Ernie Whitt started to hit well at age 30. 5 regulars had an average EqA
(around .260). Before the season, the Jays picked up Rance Mulliniks from the
Royals for RHP Phil Huffman:
Age EqA BA OBP SLG R27 EqR R RBI HR SB CS PA
Barry Bonnell 28 R LF .264 .293 .341 .407 4.95 56 59 49 6 14 2 469
Willie Upshaw 25 L 1B .263 .267 .328 .443 4.93 78 77 75 21 8 8 632
Ernie Whitt 30 L C .263 .261 .323 .440 4.90 38 28 42 11 3 1 310
Damaso Garcia 27 R 2B .259 .310 .333 .399 4.72 75 89 42 5 54 20 618
Jesse Barfield 22 R RF .256 .246 .319 .426 4.59 51 54 58 18 1 4 436
Rance Mulliniks 26 L 3B .244 .244 .325 .363 4.09 36 32 35 4 3 2 348
Garth Iorg 27 R 3B .234 .285 .305 .365 3.68 41 45 36 1 3 2 429
Lloyd Moseby 22 L CF .230 .236 .285 .370 3.50 49 51 52 9 11 7 520
Alfredo Griffin 24 S SS .206 .241 .271 .314 2.66 41 57 48 1 10 8 561
After the season, Al Woods was traded to Oakland for Cliff Johnson, and Leon
Roberts was traded to the Royals for Cecil Fielder:
Age EqA BA OBP SLG R27 EqR R RBI HR SB CS PA
Buck Martinez 33 R C .252 .242 .306 .423 4.41 32 26 37 10 1 1 284
Dave Revering 29 L DH .243 .215 .325 .370 4.04 16 15 18 5 0 3 157
Hosken Powell 27 L OF .241 .275 .307 .389 3.96 28 43 26 3 4 4 277
Al Woods 28 L OF .229 .234 .306 .343 3.49 20 20 24 3 1 3 222
Wayne Nordhagen 33 R DH .220 .270 .308 .319 3.16 16 12 20 1 0 2 195
Tony Johnson 26 R OF .219 .235 .312 .367 3.12 10 17 14 3 3 13 109
Leon Roberts 31 R DH .203 .229 .277 .295 2.58 8 6 5 1 1 1 112
On May 5/82, the Jays traded John Mayberry to the Yankees for Dave Revering
and 3B Jeff Reynolds:
Age EqA BA OBP SLG R27 EqR R RBI HR SB CS PA
John Mayberry 33 L DH .296 .273 .400 .455 6.60 6 7 3 2 0 0 40
Geno Petralli 22 S C .291 .364 .417 .409 6.33 6 3 1 0 0 0 48
Otto Velez 31 R DH .239 .192 .354 .269 3.88 6 4 5 1 1 0 65
Dave Baker 24 L 3B .238 .250 .348 .300 3.82 2 3 2 0 0 0 23
Glenn Adams 34 L DH .233 .258 .300 .364 3.64 7 2 11 1 0 0 70
Dick Davis 28 R OF .199 .286 .286 .286 2.45 0 0 2 0 0 0 7
Pedro Hernandez 23 R 3B -.200 .000 .000 .000 -2.49 -1 1 0 0 0 0 9
Triples:
Lloyd Moseby 9, Alfredo Griffin 8, Willie Upshaw 7, Garth Iorg 5,
Hosken Powell 4, Barry Bonnell 3, Damaso Garcia 3, Jesse Barfield 2,
Ernie Whitt 2, Tony Johnson 1, Al Woods 1
Doubles (leaders):
Damaso Garcia 32, Barry Bonnell 26, Rance Mulliniks 25, Willie Upshaw 25,
Alfredo Griffin 20, Garth Iorg 20, Lloyd Moseby 20, Buck Martinez 17
Times On Base (Hits + Walks) (leaders):
Willie Upshaw 207, Damaso Garcia 206, Barry Bonnell 160,
Alfredo Griffin 152, Lloyd Moseby 148, Jesse Barfield 139, Garth Iorg 131
Outs (AB-H+CS) (leaders):
Willie Upshaw 433, Damaso Garcia 432, Alfredo Griffin 417, Lloyd Moseby 379,
Barry Bonnell 311, Jesse Barfield 301, Garth Iorg 300, Rance Mulliniks 237
Strikeout-to-Walk Ratio:
Lloyd Moseby 3.2, Garth Iorg 3.2, Tony Johnson 2.4, Leon Roberts 2.3,
Wayne Nordhagen 2.2, Alfredo Griffin 2.2, Damaso Garcia 2.1,
Hosken Powell 1.9, Jesse Barfield 1.9, Willie Upshaw 1.8,
Barry Bonnell 1.6, Buck Martinez 1.4, Dave Revering 1.4,
Rance Mulliniks 1.3, Ernie Whitt 1.3, Al Woods 1.0
Games Played (leaders):
Alfredo Griffin 162, Willie Upshaw 160, Damaso Garcia 147, Lloyd Moseby 147,
Barry Bonnell 140, Jesse Barfield 139, Garth Iorg 129, Rance Mulliniks 112
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'82 Starting Pitchers
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The young staff of Stieb, Clancy, Leal and Gott were all better than average
(EqA < .260):
Age W L ERA RA* R27 IP EqA BA OBP SLG HR K/9
Dave Stieb 24 R 17 14 3.25 3.59 3.79 288.3 .231 .248 .296 .377 27 4.4
Jim Clancy 26 R 16 14 3.71 4.10 3.91 266.7 .239 .248 .301 .380 26 4.7
Luis Leal 25 R 12 15 3.93 4.34 4.31 249.7 .247 .262 .318 .396 24 4.0
Jim Gott 22 R 5 10 4.43 4.89 4.79 136.0 .258 .255 .338 .397 15 5.4
Mark Bomback 29 R 1 5 6.03 6.66 7.51 59.7 .300 .343 .401 .535 10 3.3
Age W L ERA RA* R27 IP EqA BA OBP SLG HR K/9
Mark Eichhorn 21 R 0 3 5.45 6.02 4.64 38.0 .268 .260 .321 .395 4 3.8
Clancy's 40 starts led the league:
Games Started:
Jim Clancy 40, Dave Stieb 38, Luis Leal 38, Jim Gott 23, Mark Bomback 8,
Mark Eichhorn 7, Jerry Garvin 4, Roy Lee Jackson 2, Dave Geisel 2
Stieb's 19 complete games led the league:
Complete Games:
Dave Stieb 19, Jim Clancy 11, Luis Leal 10, Jim Gott 1
Stieb's 288 innings pitched led the league, and on average he worked into the
8th inning:
Innings Pitched Per Game (IP/G):
Dave Stieb 7.6, Jim Clancy 6.7, Luis Leal 6.6, Mark Eichhorn 5.4,
Jim Gott 4.5, Mark Bomback 3.7
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'82 Relief Pitchers
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Roy Lee Jackson and Joey McLaughlin had great years in the Jays' pen. After
the season, Dale Murray and OF-C Todd Dodd were traded to the Yankees for OF
Dave Collins, RHP Mike Morgan, and throw-in Fred McGriff:
Age W L ERA RA* R27 IP EqA BA OBP SLG HR K/9
Roy Lee Jackson 28 R 8 8 3.06 3.38 3.06 97.0 .219 .218 .281 .326 7 6.6
Joey McLaughlin 25 R 8 6 3.21 3.54 3.46 70.0 .227 .212 .295 .339 7 6.3
Dale Murray 32 R 8 7 3.16 3.49 3.85 111.0 .231 .268 .319 .353 3 4.9
Dave Geisel 27 L 1 1 3.98 4.39 5.70 31.7 .262 .260 .350 .458 6 6.3
Jerry Garvin 26 L 1 1 7.25 8.00 7.30 58.3 .310 .335 .399 .531 10 5.4
After the season, Steve Senteney was traded to the Mets for Jorge Orta:
Age W L ERA RA* R27 IP EqA BA OBP SLG HR K/9
Steve Senteney 26 R 0 0 4.91 5.42 5.13 22.0 .267 .247 .293 .456 5 8.2
Ken Schrom 27 R 1 0 5.87 6.48 6.28 15.3 .288 .232 .394 .437 3 4.7
Relief Appearances:
Dale Murray 56, Roy Lee Jackson 46, Joey McLaughlin 44, Jerry Garvin 28,
Dave Geisel 14, Steve Senteney 11, Mark Bomback 8, Jim Gott 7,
Ken Schrom 6
Saves:
Dale Murray 11, Joey McLaughlin 8, Roy Lee Jackson 6
Innings Pitched Per Game (IP/G):
Ken Schrom 2.6, Roy Lee Jackson 2.0, Steve Senteney 2.0, Dale Murray 2.0,
Dave Geisel 2.0, Jerry Garvin 1.8, Joey McLaughlin 1.6
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1982 American League Leaders
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Robin Yount, a shortstop with 143 Equivalent Runs, won the MVP award:
Top 14 Hitters by EqA (minimum 355 plate appearances):
EqA BA OBP SLG R27 EqR R RBI HR SB CS PA
John Lowenstein BAL OF .342 .320 .418 .602 8.59 78 69 66 24 7 6 376
Robin Yount MIL SS .336 .331 .383 .578 7.76 143 129 114 29 14 3 689
Eddie Murray BAL 1B .325 .316 .394 .549 7.58 116 87 110 32 7 2 620
Oscar Gamble NYY DH .317 .272 .385 .522 7.01 67 49 57 18 6 3 374
Dwight Evans BOS OF .316 .292 .402 .534 7.54 124 122 98 32 3 2 721
Doug DeCinces CAL 3B .315 .301 .373 .548 7.04 115 94 97 30 7 5 641
Reggie Jackson CAL OF .312 .275 .376 .532 6.86 107 92 101 39 4 5 615
Toby Harrah CLE 3B .312 .304 .389 .490 6.85 116 100 78 25 17 3 686
Hal McRae KAN DH .311 .308 .365 .542 6.81 117 91 133 27 4 4 668
George Brett KAN 3B .310 .301 .380 .505 6.78 105 101 82 21 6 1 623
Cecil Cooper MIL 1B .309 .313 .345 .528 6.26 121 104 121 32 2 3 686
Fred Lynn CAL OF .308 .299 .375 .517 6.64 90 89 86 21 7 8 530
Dave Winfield NYY OF .307 .280 .336 .560 6.46 103 84 106 37 5 3 584
Gary Roenicke BAL OF .306 .270 .380 .499 6.52 77 58 74 21 6 7 463
Dave Stieb was ROBBED of the '82 Cy Young Award by the BBWAA, who gave it to,
of all people, former Jay Pete Vuckovich, who ranked 33rd on the starters' EqA
list. Palmer and Quisenberry also got more votes than Stieb:
Top 14 Starting Pitchers by EqA (minimum 139.0 innings pitched):
W L ERA RA* R27 IP EqA BA OBP SLG HR K/9
Dave Stieb TOR 17 14 3.25 3.59 3.79 288.3 .231 .248 .296 .377 27 4.4
Rick Sutcliffe CLE 14 8 2.96 3.27 3.60 216.0 .233 .226 .313 .339 16 5.9
Jim Palmer BAL 15 5 3.13 3.46 3.45 227.0 .234 .231 .284 .359 22 4.1
Bruce Kison CAL 10 5 3.17 3.50 3.51 142.0 .235 .226 .285 .359 15 5.5
Jim Beattie SEA 8 12 3.34 3.69 3.61 172.3 .236 .233 .304 .346 13 7.3
Jim Clancy TOR 16 14 3.71 4.10 3.91 266.7 .239 .248 .301 .380 26 4.7
Dan Petry DET 15 9 3.22 3.56 3.76 246.0 .239 .241 .316 .345 15 4.8
Mike Witt CAL 8 6 3.51 3.88 3.67 179.7 .242 .260 .308 .356 8 4.3
Floyd Bannister SEA 12 13 3.43 3.79 4.09 247.0 .243 .243 .301 .398 32 7.6
Len Barker CLE 15 11 3.90 4.31 3.50 244.7 .245 .232 .300 .341 17 6.9
LaMarr Hoyt CHW 19 15 3.53 3.90 3.91 239.7 .246 .266 .302 .382 17 4.7
Luis Leal TOR 12 15 3.93 4.34 4.31 249.7 .247 .262 .318 .396 24 4.0
Bobby Castillo MIN 13 11 3.66 4.04 4.15 218.7 .247 .241 .313 .389 26 5.1
Tommy John NYY 10 10 3.66 4.04 3.72 186.7 .247 .266 .299 .374 11 2.6
. . .
Pete Vuckovich MIL 18 6 3.34 3.69 4.74 223.7 .260 .275 .353 .388 14 4.2
Roy Lee Jackson pitched more effectively than Rollie Fingers, but not as well
as future Jay Bill Caudill:
Top 7 Relievers by EqA (minimum 50 innings or 10 saves):
W L ERA RA* R27 IP EqA BA OBP SLG HR K/9
Rich Gossage NYY 4 5 2.23 2.46 2.33 93.0 .203 .196 .261 .287 5 9.9
Bill Caudill SEA 12 9 2.35 2.59 2.77 95.7 .208 .192 .267 .312 9 10.4
Ed Vande Berg SEA 9 4 2.37 2.62 2.99 76.0 .212 .207 .294 .310 5 7.1
Tom Burgmeier BOS 7 0 2.29 2.53 3.57 102.3 .217 .259 .300 .367 6 3.9
Roy Lee Jackson TOR 8 8 3.06 3.38 3.06 97.0 .219 .218 .281 .326 7 6.6
Rollie Fingers MIL 5 6 2.60 2.87 2.81 79.7 .222 .220 .271 .322 5 8.0
Dan Quisenberry KAN 9 7 2.57 2.84 3.24 136.7 .222 .252 .270 .380 12 3.0
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Theory Stuff, 1982
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The Jays beat their Pythagorean record by 2 wins:
Pythagorean WPct Missed Wins
( 1) MIL 97-65 .598 | ( 1) MIN 5
( 2) CAL 95-67 .588 | ( 2) DET 3
( 3) BAL 90-72 .554 | ( 3) CAL 2
( 4) CHW 89-73 .546 | ( 4) MIL 2
( 5) KAN 88-74 .541 | ( 5) CHW 2
( 6) DET 86-76 .528 | ( 6) NYY 1
( 7) BOS 85-77 .525 | ( 7) OAK 1
( 8) NYY 80-82 .496 | ( 8) TEX 0
( 9) TOR 76-86 .466 | ( 9) SEA -2
(10) SEA 74-88 .459 | (10) KAN -2
(11) CLE 74-88 .459 | (11) TOR -2
(12) OAK 69-93 .423 | (12) CLE -4
(13) MIN 65-97 .401 | (13) BOS -4
(14) TEX 64-98 .393 | (14) BAL -4
Note: PythagWPct = RF^1.83 / ( RF^1.83 + RA^1.83 )
where RF=Runs For and RA=Runs Against
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Glossary
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General:
Equivalent Average (EqA): corrects runs per 9 innings for park factor and
rescales so that .260 is average and .300 represents excellence every year:
EqA = ( (( R9 / PF ) / AvgR9) * (.260 ^ (1 / 0.4)) ) ^ 0.4
where R9 = Runs per 9 innings (defined differently in each section below)
PF = Park Factor (see explanation in Team section below)
AvgR9 = Average Runs per 9 innings in Year (see each section below)
^ 0.4 makes distribution much like batting average's
Note: Equivalent Average was invented by Clay Davenport as a 'hitter' stat.
My application of EqA to 'teams' and 'pitchers' may differ from what
he would do, and my formulas and park factors for 'hitters' differ,
but my resulting hitter EqAs are very similar in practice.
Estimated Runs Produced: ERP = 0.16*(3H+2D+4T+6HR+2BB+SB-0.605*(AB-H+CS)),
invented by Paul Johnson, more accurate than Bill James' runs created,
background info available at http://www.stephent.com/jays/erp.html
ERPAdj: ratio of league's Runs to ERP, always close to 1.0, .990 in 1982
Age: as of July 1, 1982
Team Stats Glossary:
Runs Scored Per 9 IP: runs scored per 9 innings pitched by the team, not
against the team (the latter would be preferable but is harder to find).
For example, in 1982, the Jays scored 651 runs, allowed 701 runs, and
pitched 1443.7 innings, from which the listed numbers were calculated.
Team Equivalent Average: in EqA formula above, R9 is team's runs scored per
9 IP, and AvgR9 is league average runs per 9 IP (4.50 in 1982)
Opponents' Equivalent Average: R9 is team's runs allowed per 9 IP
Park Factor (PF): divisor which corrects run totals for park effect;
Total Baseball, 5th ed. lists two park factors for each team, one for hitters
and one for pitchers, to correct for the advantage of not facing your own
team's pitching or vice versa, a minor detail. I took the average of the two
park factors for each team and normalized them so that their product was 1.0.
Example, if TB5's park factors were 105 and 106, I would average them to
105.5, which after normalization might be 1.054. To not repeat the 1.0 and
0.9 prefixes excessively, the listed numbers are (PF-1)*100. For example,
the park factor of 1.054 would be listed as 5.4. To get the park factor (PF)
from the listed number, divide it by 100 and add 1. TB5's park factors are
based on data from 1981-1983 except when the park changed.
Hitting Stats Glossary:
Group1: hitters with 9 most plate appearances (more if tie for 9th in PA)
Group2: other hitters with at least 100 PA
Group3: remaining hitters
L/R/S: bats Left, Right, or Switch
EqA: Equivalent Average, in formula above, R9 = R27 * ERPAdj (R27 defined below,
ERPAdj defined above), AvgR9 = 4.50 / 1.04 (estimate of Major League
average from 1982 American League average, 1.04 accounts for DH rule)
BA: Batting Average, (H/AB), inaccurate measure of batting ability (ignores
power, walks, stealing, park factor, league average), use EqA instead
OBP: On-Base Percentage, estimated as (H+BB)/(AB+BB)
SLG: Slugging Average, (H+D+2T+3HR)/AB
R27: estimate of how many runs a lineup of that player would score in a game,
i.e. ERP per 27 outs, in 1982, 25.7*ERP/(AB-H+CS), average roughly 4.50
EqR: Equivalent Runs, park-adjusted Estimated Runs Produced scaled so that
100 represents excellence every year, EqR=(ERPAdj*ERP/PF)*(4.50/AvgR9),
AvgR9 same as in hitter EqA, results similar to Clay Davenport's
R: Runs Scored
RBI: Runs Batted In, inaccurate measure of run production, use EqR instead
D: Doubles, T: Triples, HR: Home Runs, AB: At Bats, BB: Walks
SB: Stolen Bases, CS: Caught Stealing
PA: Plate Appearances (estimated as AB+BB)
Pitching Stats Glossary:
Starting Pitcher = at least one-third of appearances were starts
Group1: starting pitchers with 5 most starts (more if tie for 5th in starts)
Group2: remaining starters
Group3: relief pitchers with 5 most relief appearances
Group4: remaining relievers
W: Wins, L: Losses, L/R: Left-hander or Right-hander
ERA: Earned Run Average (9*ER/IP), ER = Earned Runs allowed
RA: Run Average (9*R/IP), R = total Runs allowed
RA*: RA estimated from ERA because pitcher runs is an astonishingly hard stat
to find for non-recent years; in 1982, estimated as 1.10*ERA
R27: ERP per 27 outs (9*ERP/IP, ERP estimated as below)
IP: Innings Pitched
EqA: Equivalent Average against pitcher, based on ERA, RA* and R27:
in EqA formula, let R9 = (1.10*ERA)/6 + (RA*)/3 + (.990*R27)/2
and AvgR9 = American League average runs per 9 IP (4.50 in 1982),
not as accurate a stat as hitter EqA, but better than just ERA
BA: Batting Average against pitcher
OBP: On-Base Percentage against pitcher (estimated as (H+BB)/(AB+BB))
SLG: Slugging Average against pitcher (uses below estimates of D and T)
HR: Home Runs allowed, H: Hits allowed, BB: walks
K/9: Strikeouts per 9 innings (9*K/IP)
ERP: Estimated Runs Produced against pitcher, estimated as follows:
AB: At Bats, determined from H/BA, rounded to nearest integer
D: Doubles, estimated as .19*(H-HR) (based on 1982 AL average)
T: Triples, estimated as .15*D in 1982
SB: Stolen Bases, estimated as .064*(H+BB-D-T-HR) in 1982
CS: Caught Stealing, estimated as .57*SB in 1982
ERP = 0.16*(3H+2D+4T+6HR+2BB+SB-0.605(AB-H+CS))
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Sources
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Most raw data from Sean Lahman's Baseball Archive, http://www.baseball1.com
Ages, left vs right vs switch, games by position, from The Sports Encyclopedia:
Baseball 17th ed., 1997, David S. Neft and Richard M. Cohen.
Park factors are based on the ones in Total Baseball, Fifth Edition, 1997,
edited by John Thorn, Pete Palmer, Michael Gershman and David Pietrusza.
Also, specific outfield positions (RF, CF, LF) are from TB5.
Equivalent Average and Equivalent Runs are in the same spirit as described by
Clay Davenport in Baseball Prospectus 1997 Edition, Gary Huckabay, Clay
Davenport, Rany Jazayerli, Chris Kahrl, Joseph S. Sheehan,
http://www.baseballprospectus.com/
Estimated Runs Produced is described by Paul Johnson in the The Bill James
Baseball Abstract 1985.
Jays trades are listed in the Toronto Blue Jays Official Guide 1996.
I cannot guarantee that no errors were made in processing or presenting this
information.
--
Stephen Tomlinson http://www.stephent.com/jays/
mailto:stephent@ottawa.com Ottawa, Ontario
"What is the evidence, and what does it mean?" (Bill James)
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Last Updated: 1998 Feb 11
Comments are welcome at comments@stephent.com.