American League Pitching Leaders

Wins Above Replacement--all
1. Lynn • BOS 8.9
2. Brett • KCR 8.6
3. Porter • KCR 7.6
4. Koosman • MIN 7.2
5. Eckersley • BOS 7.2
6. Bell • TEX 6.9
7. Guidry • NYY 6.5
8. Rice • BOS 6.4
9. Wilson • KCR 6.3
10. Kern • TEX 6.1
WAR for Pitchers
1. Koosman • MIN 7.2
2. Eckersley • BOS 7.2
3. Guidry • NYY 6.5
4. Kern • TEX 6.1
5. Morris • DET 5.8
6. Monge • CLE 5.6
7. John • NYY 5.5
8. López • DET 5.3
9. Parrott • SEA 5.1
10. Caldwell • MIL 4.8
Earned Run Average
1. Guidry • NYY 2.78
2. John • NYY 2.96
3. Eckersley • BOS 2.99
4. Flanagan • BAL 3.08
5. Morris • DET 3.28
6. Caldwell • MIL 3.29
7. McGregor • BAL 3.35
8. Koosman • MIN 3.38
9. Baumgarten • CHW 3.54
10. Zahn • MIN 3.57
Wins
1. Flanagan • BAL 23
2. John • NYY 21
3. Koosman • MIN 20
4. Guidry • NYY 18
5. Comer • TEX 17
Eckersley • BOS 17
Morris • DET 17
8. Caldwell • MIL 16
Frost • CAL 16
Jenkins • TEX 16
Ryan • CAL 16
Stanley • BOS 16
Torrez • BOS 16
Waits • CLE 16
Win-Loss %
1. Davis • NYY .875
2. Caldwell • MIL .727
3. Kern • TEX .722
4. Flanagan • BAL .719
5. Morris • DET .708
6. John • NYY .700
7. Guidry • NYY .692
8. Clear • CAL .688
9. McGregor • BAL .684
10. Zahn • MIN .650
Walks & Hits per IP
1. McGregor • BAL 1.076
2. Guidry • NYY 1.159
3. Flanagan • BAL 1.186
4. Eckersley • BOS 1.188
5. Leonard • KCR 1.195
6. Morris • DET 1.204
7. John • NYY 1.205
8. Martínez • BAL 1.221
9. Caldwell • MIL 1.238
10. Sorensen • MIL 1.241
Hits per 9 IP
1. Ryan • CAL 6.831
2. Kravec • CHW 7.488
3. Guidry • NYY 7.731
4. Morris • DET 8.150
5. Baumgarten • CHW 8.260
6. Flanagan • BAL 8.300
7. Stone • BAL 8.371
8. Underwood • TOR 8.445
9. Frost • CAL 8.499
10. McGregor • BAL 8.502
Bases On Balls per 9 IP
1. McGregor • BAL 1.185
2. Caldwell • MIL 1.494
3. Sorensen • MIL 1.606
4. Stanley • BOS 1.828
5. John • NYY 2.117
6. Leonard • KCR 2.136
7. Eckersley • BOS 2.153
8. Travers • MIL 2.162
9. Zahn • MIN 2.183
10. Slaton • MIL 2.282
Strikeouts per 9 IP
1. Ryan • CAL 9.013
2. Guidry • NYY 7.654
3. Flanagan • BAL 6.437
4. Jenkins • TEX 5.699
5. Bannister • SEA 5.676
6. Eckersley • BOS 5.473
7. Koosman • MIN 5.359
8. Wortham • CHW 5.250
9. Renko • BOS 5.211
10. Johnson • 2TM 5.174
Games Played
1. Marshall • MIN 90
2. Monge • CLE 76
3. Kern • TEX 71
4. Lyle • TEX 67
5. Heaverlo • OAK 62
6. Cruz • CLE 61
López • DET 61
8. Hrabosky • KCR 58
9. Montague • 2TM 55
10. Drago • BOS 53
LaRoche • CAL 53
Farmer • 2TM 53
Saves
1. Marshall • MIN 32
2. Kern • TEX 29
3. Stanhouse • BAL 21
López • DET 21
5. Monge • CLE 19
6. Gossage • NYY 18
7. Farmer • 2TM 14
McLaughlin • SEA 14
Clear • CAL 14
10. Lyle • TEX 13
Drago • BOS 13
Innings Pitched
1. Martínez • BAL 292.1
2. John • NYY 276.1
3. Flanagan • BAL 265.2
4. Koosman • MIN 263.2
5. Jenkins • TEX 259.0
6. Torrez • BOS 252.1
7. Goltz • MIN 250.2
8. Kravec • CHW 250.0
9. Eckersley • BOS 246.2
10. Comer • TEX 242.1
Strikeouts
1. Ryan • CAL 223
2. Guidry • NYY 201
3. Flanagan • BAL 190
4. Jenkins • TEX 164
5. Koosman • MIN 157
6. Eckersley • BOS 150
7. Kern • TEX 136
8. Goltz • MIN 132
Kravec • CHW 132
Martínez • BAL 132
Games Started
1. Martínez • BAL 39
2. Flanagan • BAL 38
3. Jenkins • TEX 37
4. Comer • TEX 36
John • NYY 36
Koosman • MIN 36
Torrez • BOS 36
8. Goltz • MIN 35
Kravec • CHW 35
Splittorff • KCR 35
Complete Games
1. Martínez • BAL 18
2. Eckersley • BOS 17
Ryan • CAL 17
John • NYY 17
5. Sorensen • MIL 16
Flanagan • BAL 16
Caldwell • MIL 16
8. Guidry • NYY 15
9. Langford • OAK 14
10. Parrott • SEA 13
Shutouts
1. Flanagan • BAL 5
Ryan • CAL 5
Leonard • KCR 5
4. Caldwell • MIL 4
Stanley • BOS 4
6. Baumgarten • CHW 3
Waits • CLE 3
John • NYY 3
Jenkins • TEX 3
Kravec • CHW 3
Slaton • MIL 3
Lemanczyk • TOR 3
Martínez • BAL 3
Home Runs
1. Jenkins • TEX 40
2. Leonard • KCR 33
Travers • MIL 33
4. Stone • BAL 31
5. Sorensen • MIL 30
6. Eckersley • BOS 29
Gura • KCR 29
8. Martínez • BAL 28
9. Haas • MIL 26
Waits • CLE 26
Bases on Balls
1. Torrez • BOS 121
2. Ryan • CAL 114
3. Kravec • CHW 111
4. Wortham • CHW 100
5. Gale • KCR 99
6. Underwood • TOR 95
7. Norris • OAK 94
8. Waits • CLE 91
9. Parrott • SEA 86
10. Comer • TEX 84
Hits
1. Goltz • MIN 282
2. Martínez • BAL 279
3. John • NYY 268
Koosman • MIN 268
5. Torrez • BOS 254
6. Caldwell • MIL 252
Jenkins • TEX 252
8. Sorensen • MIL 250
Stanley • BOS 250
10. Splittorff • KCR 248
Strikeouts / Base On Balls
1. McGregor • BAL 3.522
2. Guidry • NYY 2.831
3. Flanagan • BAL 2.714
4. Eckersley • BOS 2.542
5. Caldwell • MIL 2.282
6. Leonard • KCR 2.250
7. Jenkins • TEX 2.025
8. Tiant • NYY 1.962
9. Ryan • CAL 1.956
10. Morris • DET 1.915
Home Runs per 9 IP
1. John • NYY 0.293
2. Stanley • BOS 0.582
3. Ryan • CAL 0.606
4. Slaton • MIL 0.634
5. Frost • CAL 0.639
6. Koosman • MIN 0.649
7. Parrott • SEA 0.667
8. Caldwell • MIL 0.689
9. Zahn • MIN 0.692
10. Torrez • BOS 0.713
Losses
1. Huffman • TOR 18
2. Keough • OAK 17
Splittorff • KCR 17
4. Langford • OAK 16
Martínez • BAL 16
Underwood • TOR 16
7. Bannister • SEA 15
Marshall • MIN 15
9. Jenkins • TEX 14
Ryan • CAL 14
Sorensen • MIL 14
Wortham • CHW 14
Johnson • 2TM 14
Earned Runs
1. Torrez • BOS 126
2. Martínez • BAL 119
3. Jenkins • TEX 117
4. Goltz • MIN 116
Gura • KCR 116
6. Gale • KCR 114
Waits • CLE 114
8. Splittorff • KCR 113
9. Huffman • TOR 111
Wortham • CHW 111
Wild Pitches
1. Langford • OAK 16
2. Wortham • CHW 14
3. Keough • OAK 13
4. John • NYY 11
Lemanczyk • TOR 11
Underwood • TOR 11
7. Barker • CLE 10
Jackson • MIN 10
Kingman • OAK 10
McLaughlin • SEA 10
Norris • OAK 10
Hit By Pitch
1. Kravec • CHW 14
2. Wilcox • DET 11
3. McCatty • OAK 10
4. Norris • OAK 9
Underwood • TOR 9
6. Comer • TEX 8
Moore • TOR 8
8. Billingham • DET 7
Gura • KCR 7
Keough • OAK 7
Batters Faced
1. Martínez • BAL 1,206
2. John • NYY 1,116
3. Torrez • BOS 1,109
4. Koosman • MIN 1,101
5. Jenkins • TEX 1,089
6. Flanagan • BAL 1,085
7. Goltz • MIN 1,061
8. Kravec • CHW 1,041
9. Splittorff • KCR 1,026
10. Comer • TEX 1,021
Games Finished
1. Marshall • MIN 84
2. Kern • TEX 57
3. Lyle • TEX 53
Monge • CLE 53
5. López • DET 49
6. Cruz • CLE 48
7. Stanhouse • BAL 46
8. Heaverlo • OAK 42
9. Buskey • TOR 40
10. Clear • CAL 37
Drago • BOS 37
Hrabosky • KCR 37
Adjusted ERA+
1. Eckersley • BOS 149
2. Guidry • NYY 146
3. John • NYY 137
4. Morris • DET 133
5. Flanagan • BAL 131
6. Koosman • MIN 130
7. Caldwell • MIL 127
8. Zahn • MIN 124
9. Baumgarten • CHW 121
10. McGregor • BAL 120
Fielding Independent Pitching
1. Guidry • NYY 3.03
2. John • NYY 3.10
3. Ryan • CAL 3.22
4. Flanagan • BAL 3.25
5. Koosman • MIN 3.46
6. Caldwell • MIL 3.52
7. McGregor • BAL 3.65
8. Goltz • MIN 3.66
9. Slaton • MIL 3.69
10. Stanley • BOS 3.72
Adj. Pitching Runs
1. Eckersley • BOS 39
2. Kern • TEX 39
3. Guidry • NYY 35
4. John • NYY 32
5. Koosman • MIN 30
6. Monge • CLE 28
7. López • DET 27
8. Marshall • MIN 27
9. Flanagan • BAL 27
10. Morris • DET 25
Adj. Pitching Wins
1. Eckersley • BOS 4.1
2. Kern • TEX 3.9
3. Guidry • NYY 3.6
4. John • NYY 3.3
5. Koosman • MIN 3.1
6. Monge • CLE 2.8
7. López • DET 2.7
8. Flanagan • BAL 2.7
9. Marshall • MIN 2.7
10. Morris • DET 2.6
Base-Out Runs Saved (RE24)
1. Eckersley • BOS 43.50
2. Kern • TEX 41.61
3. Guidry • NYY 41.36
4. John • NYY 35.36
5. Koosman • MIN 34.61
6. Flanagan • BAL 32.04
7. López • DET 31.46
8. Morris • DET 28.37
9. Caldwell • MIL 27.55
10. Monge • CLE 26.88
Win Probability Added (WPA)
1. López • DET 6.6
2. Eckersley • BOS 4.7
3. Kern • TEX 4.7
4. John • NYY 4.7
5. Flanagan • BAL 4.4
6. Stanhouse • BAL 4.4
7. Guidry • NYY 4.3
8. Monge • CLE 4.0
9. Caldwell • MIL 3.6
10. McLaughlin • SEA 3.0
Sit. Wins Saved (WPA/LI)
1. John • NYY 4.3
2. Flanagan • BAL 3.2
3. Guidry • NYY 3.1
4. Kern • TEX 3.0
5. Caldwell • MIL 2.8
6. Eckersley • BOS 2.7
7. McGregor • BAL 2.7
8. Koosman • MIN 2.3
9. Kravec • CHW 2.1
Slaton • MIL 2.1
Championship WPA (cWPA)
1. Eckersley • BOS 4.9
2. Leonard • KCR 4.6
3. Flanagan • BAL 4.2
4. Stanhouse • BAL 4.1
5. Kern • TEX 3.5
6. Koosman • MIN 3.5
7. Marshall • MIN 3.1
8. Frost • CAL 3.0
9. John • NYY 2.6
10. Stanley • BOS 2.5
Base-Out Wins Saved (REW)
1. Eckersley • BOS 4.4
2. Guidry • NYY 4.4
3. Kern • TEX 4.2
4. John • NYY 3.7
5. Koosman • MIN 3.5
6. Flanagan • BAL 3.4
7. López • DET 3.1
8. Morris • DET 2.9
9. Caldwell • MIL 2.8
10. Monge • CLE 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 batting rate stats, generally a minimum of 3.1 Plate Appearances/G, 1.0 IP/G, 0.67 Gm and Chances/Team Game (fielding), 0.2 SB att/Team Game (catchers), and 0.1 SB att/Team Game (baserunners only since 1951), and 0.1 decision/G for single-season leaderboards generally needed for rate statistics. For pitcher fielding the minimums are reduced by a third. For LF, CF, RF fielding stats, we only have reliable data since 1901, so all leaders are since 1901. Explanation of min. requirements