American League Pitching Leaders

Wins Above Replacement--all

<strong>Wins Above Replacement</strong><br>A single number that presents the number of wins the player added<br>to the team above what a replacement player (think AAA or AAAA) would add.<br>Scale for a single-season: 8+ MVP Quality, 5+ All-Star Quality, 2+ Starter,<br>0-2 Reserve, < 0 Replacement Level <br>Developed by Sean Smith of BaseballProjection.com

1. Chance • LAA 8.7
2. Robinson • BAL 8.1
3. Fregosi • LAA 7.9
4. Hansen • CHW 7.6
5. Ford • NYY 6.8
Oliva • MIN 6.8
7. Allison • MIN 6.4
8. Ward • CHW 6.3
9. Radatz • BOS 6.0
10. Powell • BAL 5.7

WAR for Pitchers

<strong>Wins Above Replacement for Pitchers</strong><br>A single number that presents the number of wins the player added<br>to the team above what a replacement player (think AAA or AAAA) would add. This value includes defensive support and includes additional value for high leverage situations.<br>Scale: 8+ MVP Quality, 5+ All-Star Quality, 2+ Starter,<br>0-2 Reserve, < 0 Replacement Level <br> Developed by Sean Smith of BaseballProjection.com

1. Chance • LAA 9.4
2. Ford • NYY 6.7
3. Radatz • BOS 6.1
4. Horlen • CHW 5.0
5. McDowell • CLE 4.8
6. Lee • LAA 4.3
7. Peters • CHW 4.2
8. Stock • 2TM 4.2
9. Bouton • NYY 4.1
10. Tiant • CLE 3.9

Earned Run Average

<strong>9 * ER / IP</strong><br>For recent years, leaders need 1 IP<br>per team game played.<br>Bold indicates lowest ERA using current stats<br><span class=glimmer>Gold</span> means awarded ERA title at end of year.

1. Chance • LAA 1.65
2. Horlen • CHW 1.88
3. Ford • NYY 2.13
4. Peters • CHW 2.50
5. Pizarro • CHW 2.56
6. Bunker • BAL 2.69
7. McDowell • CLE 2.70
8. Newman • LAA 2.75
9. Roberts • BAL 2.91
10. Pappas • BAL 2.97

Wins

Wins

1. Chance • LAA 20
Peters • CHW 20
3. Bunker • BAL 19
Pizarro • CHW 19
Wickersham • DET 19
6. Bouton • NYY 18
Lolich • DET 18
8. Ford • NYY 17
Kaat • MIN 17
10. Pappas • BAL 16
Radatz • BOS 16

Win-Loss %

<strong>Win-Loss Percentage</strong><br>W / (W + L)<br>For players, leaders need one decision for every ten team games.<br>For managers, minimum to qualify for leading is 320 games.

1. Bunker • BAL .792
2. Ford • NYY .739
3. Peters • CHW .714
4. Pappas • BAL .696
5. Chance • LAA .690
6. Pizarro • CHW .679
7. Lolich • DET .667
8. Roberts • BAL .650
9. McDowell • CLE .647
10. Radatz • BOS .640

Walks & Hits per IP

<strong>(BB + H)/IP</strong><br>For recent years, leaders need 1 IP<br>per team game played

1. Horlen • CHW 0.935
2. Chance • LAA 1.006
3. Pizarro • CHW 1.038
4. Bunker • BAL 1.042
5. Bouton • NYY 1.058
6. Pappas • BAL 1.085
7. Ford • NYY 1.099
8. Lolich • DET 1.121
9. Newman • LAA 1.137
10. Peters • CHW 1.173

Hits per 9 IP

<strong>9 x H / IP</strong><br>For recent years, leaders need 1 IP<br>per team game played

1. Horlen • CHW 6.066
2. Chance • LAA 6.273
3. Bunker • BAL 6.771
4. Peters • CHW 7.136
5. Pizarro • CHW 7.268
6. Downing • NYY 7.414
7. Bouton • NYY 7.529
8. Stigman • MIN 7.579
9. Lolich • DET 7.603
10. McDowell • CLE 7.685

Bases On Balls per 9 IP

<strong>9 x BB / IP</strong><br>For recent years, leaders need 1 IP<br>per team game played

1. Monbouquette • BOS 1.538
2. Pappas • BAL 1.717
3. Newman • LAA 1.847
4. Bouton • NYY 1.990
5. Pizarro • CHW 2.071
6. Ford • NYY 2.097
7. Kaat • MIN 2.222
8. Osteen • WSA 2.241
9. Roberts • BAL 2.294
10. Horlen • CHW 2.350

Strikeouts per 9 IP

<strong>9 x SO / IP</strong><br>For recent years, leaders need 1 IP<br>per team game played

1. McDowell • CLE 9.190
2. Downing • NYY 8.004
3. Peña • KCA 7.550
4. Stigman • MIN 7.532
5. Morehead • BOS 7.506
6. Lolich • DET 7.448
7. Wilson • BOS 7.384
8. Pascual • MIN 7.171
9. Stange • 2TM 6.934
10. Peters • CHW 6.742

Games Played

Games Played or Pitched

1. Wyatt • KCA 81
2. Radatz • BOS 79
3. Wilhelm • CHW 73
4. McMahon • CLE 70
5. Miller • BAL 66
6. Lee • LAA 64
Stock • 2TM 64
8. Kline • WSA 61
9. Fisher • CHW 59
10. Duliba • LAA 58

Saves

Saves

1. Radatz • BOS 29
2. Wilhelm • CHW 27
3. Miller • BAL 22
4. Wyatt • KCA 20
5. Lee • LAA 19
6. McMahon • CLE 16
7. Kline • WSA 14
Worthington • MIN 14
9. Mikkelsen • NYY 12
10. Sherry • DET 11
Abernathy • CLE 11

Innings Pitched

Innings Pitched

1. Chance • LAA 278.1
2. Peters • CHW 273.2
3. Bouton • NYY 271.1
4. Pascual • MIN 267.1
5. Osteen • WSA 257.0
6. Wickersham • DET 254.0
7. Pappas • BAL 251.2
8. Ford • NYY 244.2
9. Downing • NYY 244.0
10. Kaat • MIN 243.0

Strikeouts

Strikeouts

1. Downing • NYY 217
2. Pascual • MIN 213
3. Chance • LAA 207
4. Peters • CHW 205
5. Lolich • DET 192
6. Peña • KCA 184
7. Radatz • BOS 181
8. McDowell • CLE 177
9. Ford • NYY 172
10. Kaat • MIN 171

Games Started

Games Started

1. Bouton • NYY 37
2. Ford • NYY 36
Osteen • WSA 36
Pappas • BAL 36
Pascual • MIN 36
Peters • CHW 36
Wickersham • DET 36
8. Chance • LAA 35
Downing • NYY 35
Monbouquette • BOS 35
Seguí • KCA 35

Complete Games

Complete Game

1. Chance • LAA 15
2. Pascual • MIN 14
3. Kaat • MIN 13
Osteen • WSA 13
Pappas • BAL 13
6. Lolich • DET 12
Ford • NYY 12
Bunker • BAL 12
9. Peters • CHW 11
Pizarro • CHW 11
Wickersham • DET 11
Downing • NYY 11
Grant • 2TM 11
Bouton • NYY 11

Shutouts

Shutouts<br>No runs allowed and a complete game.

1. Chance • LAA 11
2. Ford • NYY 8
3. Pappas • BAL 7
4. Lolich • DET 6
5. Monbouquette • BOS 5
6. Roberts • BAL 4
Bouton • NYY 4
Pizarro • CHW 4
9. Kralick • CLE 3
McNally • BAL 3
Peters • CHW 3
Buzhardt • CHW 3
Tiant • CLE 3

Home Runs

Home Runs Hit/Allowed

1. Peña • KCA 40
2. Wilson • BOS 37
3. Monbouquette • BOS 34
4. Bouton • NYY 32
Grant • 2TM 32
6. Narum • WSA 31
Stigman • MIN 31
8. Pascual • MIN 30
Seguí • KCA 30
10. Wickersham • DET 28

Bases on Balls

Bases on Balls/Walks

1. Downing • NYY 120
2. Morehead • BOS 112
3. Peters • CHW 104
4. McDowell • CLE 100
5. Pascual • MIN 98
6. Seguí • KCA 94
7. Chance • LAA 86
8. Barber • BAL 81
Wickersham • DET 81
10. McBride • LAA 75

Hits

Hits/Hits Allowed

1. Monbouquette • BOS 258
2. Osteen • WSA 256
3. Pascual • MIN 245
4. Grant • 2TM 244
5. Lamabe • BOS 235
6. Kaat • MIN 231
Peña • KCA 231
8. Bouton • NYY 227
9. Pappas • BAL 225
10. Wickersham • DET 224

Strikeouts / Base On Balls

<strong>SO/W or SO/BB</strong><br>For recent years, pitching leaders need 1 IP<br>per team game played.<br>No batting leaders computed.

1. Pappas • BAL 3.271
2. Ford • NYY 3.018
3. Lolich • DET 3.000
Monbouquette • BOS 3.000
5. Pizarro • CHW 2.945
6. Kaat • MIN 2.850
7. Stange • 2TM 2.640
8. Peña • KCA 2.521
9. Horlen • CHW 2.509
10. Chance • LAA 2.407

Home Runs per 9 IP

<strong>9 x HR / IP</strong><br>For recent years, leaders need 1 IP<br>per team game played

1. Chance • LAA 0.226
2. Ford • NYY 0.368
3. McDowell • CLE 0.415
4. Newman • LAA 0.426
5. Horlen • CHW 0.470
6. Peters • CHW 0.658
7. Downing • NYY 0.664
8. Osteen • WSA 0.700
9. Bunker • BAL 0.715
10. Pappas • BAL 0.751

Losses

Losses

1. Seguí • KCA 17
2. Morehead • BOS 15
Narum • WSA 15
Stigman • MIN 15
5. Monbouquette • BOS 14
O'Donoghue • KCA 14
Peña • KCA 14
Stange • 2TM 14
9. Barber • BAL 13
Bouton • NYY 13
Drabowsky • KCA 13
Lamabe • BOS 13
McBride • LAA 13
Osteen • WSA 13
Grant • 2TM 13

Earned Runs

Earned Runs Allowed

1. Lamabe • BOS 116
2. Seguí • KCA 110
3. Peña • KCA 108
4. Monbouquette • BOS 105
5. Wilson • BOS 101
6. Drabowsky • KCA 99
7. Pascual • MIN 98
8. Wickersham • DET 97
9. Narum • WSA 95
O'Donoghue • KCA 95
Osteen • WSA 95

Wild Pitches

Wild Pitches

1. Peters • CHW 15
2. Downing • NYY 14
3. Kaat • MIN 13
4. McMahon • CLE 12
5. Connolly • BOS 11
McDowell • CLE 11
7. Belinsky • LAA 10
Pizarro • CHW 10
9. Chance • LAA 9
Drabowsky • KCA 9
Stigman • MIN 9

Hit By Pitch

Times Hit by a Pitch.

1. McBride • LAA 16
2. Wickersham • DET 12
3. Kaat • MIN 9
Kralick • CLE 9
McNally • BAL 9
6. Aguirre • DET 8
Drabowsky • KCA 8
Peña • KCA 8
9. Barber • BAL 7
Latman • LAA 7
Newman • LAA 7
Pappas • BAL 7
Peters • CHW 7
Radatz • BOS 7
Ridzik • WSA 7

Batters Faced

Batters Faced

1. Pascual • MIN 1,136
2. Peters • CHW 1,117
3. Chance • LAA 1,093
4. Bouton • NYY 1,086
5. Osteen • WSA 1,070
6. Wickersham • DET 1,064
7. Downing • NYY 1,041
8. Kaat • MIN 1,009
9. Pappas • BAL 1,005
10. Ford • NYY 996

Games Finished

Games Finished<br>Credited to the last pitcher to appear for a team in a game.<br>Complete Games are not counted as Games Finished.

1. Radatz • BOS 67
2. Wyatt • KCA 57
3. Wilhelm • CHW 55
4. Kline • WSA 52
5. Miller • BAL 46
6. Lee • LAA 39
McMahon • CLE 39
8. Duliba • LAA 35
9. Worthington • MIN 32
10. Fisher • CHW 30

Adjusted ERA+

<strong>ERA+</strong><br>100*[lgERA/ERA]<br>Adjusted to the player&#x2019;s ballpark(s).

1. Chance • LAA 200
2. Horlen • CHW 184
3. Ford • NYY 170
4. Peters • CHW 138
5. Pizarro • CHW 135
6. McDowell • CLE 135
7. Bunker • BAL 134
8. Roberts • BAL 124
9. Pappas • BAL 121
10. Newman • LAA 120

Fielding Independent Pitching

<strong>Fielding Independent Pitching</strong><br>this stat measures a pitcher's effectiveness at preventing HR, BB, HBP and causing SO<br><tt>(13*HR + 3*(BB+HBP) - 2*SO)/IP + Constant<sub>lg</sub></tt><br>The constant is set so that each season major-league average FIP is the same as the major-league avg ERA

1. Chance • LAA 2.39
2. Ford • NYY 2.45
3. Horlen • CHW 2.81
4. McDowell • CLE 2.95
5. Newman • LAA 3.07
6. Pappas • BAL 3.10
7. Pizarro • CHW 3.23
8. Downing • NYY 3.26
9. Peters • CHW 3.27
10. Kaat • MIN 3.28

Adj. Pitching Runs

<strong>Adjusted Pitching Runs</strong><br>A set of formulas developed by Gary Gillette, Pete Palmer and others<br>that estimates a pitcher&#x2019;s total contributions<br>to a team&#x2019;s runs total via linear weights.<br>0.0 is an avg performance, <0 is worse than avg and >0 is better than avg

1. Chance • LAA 57
2. Ford • NYY 40
3. Horlen • CHW 37
4. Peters • CHW 29
5. Lee • LAA 28
6. Radatz • BOS 26
7. Pizarro • CHW 24
8. Bunker • BAL 22
9. Wilhelm • CHW 21
10. Pappas • BAL 20

Adj. Pitching Wins

<strong>Adjusted Pitching Wins</strong><br>A set of formulas developed by Gary Gillette, Pete Palmer and others<br>that estimates a pitcher&#x2019;s total contributions<br>to a team&#x2019;s wins with his arm.<br>0.0 is an avg performance, <0 is worse than avg and >0 is better than avg

1. Chance • LAA 6.5
2. Ford • NYY 4.5
3. Horlen • CHW 4.2
4. Peters • CHW 3.2
5. Lee • LAA 3.0
6. Radatz • BOS 2.8
7. Pizarro • CHW 2.7
8. Bunker • BAL 2.4
9. Wilhelm • CHW 2.3
10. Pappas • BAL 2.1

Base-Out Runs Saved (RE24)

<strong>Base-Out Runs Saved</strong><br>Given the bases occupied/out situation, how many runs did the pitcher<br>save in the resulting play. Compared to average, so 0 is average, and<br>above 0 is better than average

1. Chance • LAA 65.10
2. Ford • NYY 44.63
3. Horlen • CHW 36.05
4. Peters • CHW 29.77
5. Radatz • BOS 28.85
6. Pizarro • CHW 28.75
7. Stock • 2TM 26.42
8. Wilhelm • CHW 25.67
9. Lee • LAA 25.27
10. Pappas • BAL 24.49

Win Probability Added (WPA)

<strong>Win Probability Added by Pitcher</strong><br>Given average teams, this is the change in probability.<br>See <a href='https://www.baseball-reference.com/about/wpa.shtml'>Win Expectancy explainer</a> for details.

1. Chance • LAA 8.4
2. Ford • NYY 5.0
3. Horlen • CHW 4.0
4. Radatz • BOS 3.8
5. Pizarro • CHW 3.7
6. Wilhelm • CHW 3.2
7. Fisher • CHW 3.2
8. Hall • BAL 2.8
9. Lee • LAA 2.8
10. Peters • CHW 2.7

Sit. Wins Saved (WPA/LI)

<strong>Situational Wins (WPA/LI)</strong><br>It is the sum of WPA divided by the leverage index for each play.<br>WPA depends greatly on the context of the at bats.<br>This stat does not.

1. Chance • LAA 6.2
2. Horlen • CHW 4.8
3. Ford • NYY 4.3
4. Bouton • NYY 3.4
5. Pappas • BAL 3.2
6. Lee • LAA 2.8
7. Pizarro • CHW 2.8
8. Bunker • BAL 2.7
9. Peters • CHW 2.5
10. Hall • BAL 2.5

Championship WPA (cWPA)

<strong>Championship Win Probability Added by Pitcher</strong><br>Given average teams, this is the change in probability of winning the World Series, displayed in percentage points.<br>See <a href='https://www.baseball-reference.com/about/wpa.shtml'>Win Expectancy explainer</a> for details.

1. Horlen • CHW 14.2
2. Ford • NYY 13.6
3. Hall • BAL 12.6
4. Fisher • CHW 11.9
5. Peters • CHW 10.7
6. Pappas • BAL 9.4
7. Wilhelm • CHW 9.0
8. Bunker • BAL 8.3
9. Downing • NYY 7.2
10. Ramos • 2TM 6.7

Base-Out Wins Saved (REW)

<strong>Base-Out Wins Saved</strong><br>This is the number of wins above average the player was worth by their performance<br>measured by the 24 base-out situations.

1. Chance • LAA 8.0
2. Ford • NYY 5.1
3. Horlen • CHW 4.2
4. Peters • CHW 3.4
5. Pizarro • CHW 3.3
6. Radatz • BOS 3.0
7. Lee • LAA 2.9
8. Wilhelm • CHW 2.8
9. Stock • 2TM 2.8
10. Pappas • BAL 2.7

A ** by the stat's value indicates the player had fewer than the required number of at bats or plate appearances for the BA, OBP, SLG or OPS title that year. In order to rank the player, the necessary number of hitless at bats were added to the player's season total. The value printed here is their actual value and not the value used to rank them, therefore some numbers may appear out of order.

For rate stats, generally a minimum of 3.1 Plate Appearances/Team Game (batting), 1.0 IP/Team Game (pitching), 0.67 Gm and Chances/Team Game (fielding), 0.2 SB att/Team Game (catchers), 0.1 SB att/Team Game (baserunners only since 1951), and 0.1 decision/Team Game (W-L%) is needed for single-season leaderboards. For pitcher fielding the minimums are reduced by a third. For LF, CF, RF fielding stats, we only have reliable data since 1898, so all leaders are since 1898. Explanation of min. requirements