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. Brett • KCR 9.4
2. Henderson • OAK 8.8
3. Wilson • KCR 8.6
4. Yount • MIL 7.1
5. Burns • CHW 7.0
6. Murphy • OAK 6.9
7. Cooper • MIL 6.8
8. Randolph • NYY 6.6
9. Bell • TEX 6.5
10. Oglivie • MIL 6.5

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. Burns • CHW 7.0
2. Gura • KCR 6.0
3. Norris • OAK 5.9
4. Corbett • MIN 5.7
5. Clancy • TOR 5.5
6. May • NYY 4.9
7. Stieb • TOR 4.9
8. Haas • MIL 4.5
9. McGregor • BAL 4.5
10. Matlack • TEX 4.3

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. May • NYY 2.46
2. Norris • OAK 2.53
3. Burns • CHW 2.84
4. Keough • OAK 2.92
5. Gura • KCR 2.95
6. Haas • MIL 3.10
7. Stone • BAL 3.23
8. Erickson • MIN 3.25
9. Langford • OAK 3.26
10. Clancy • TOR 3.30

Wins

Wins

1. Stone • BAL 25
2. John • NYY 22
Norris • OAK 22
4. Leonard • KCR 20
McGregor • BAL 20
6. Barker • CLE 19
Langford • OAK 19
8. Gura • KCR 18
9. Guidry • NYY 17
10. Flanagan • BAL 16
Haas • MIL 16
Keough • OAK 16
Koosman • MIN 16
Morris • DET 16
Palmer • BAL 16
Spillner • CLE 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. Stone • BAL .781
2. Darwin • TEX .765
3. May • NYY .750
4. McGregor • BAL .714
5. John • NYY .710
Norris • OAK .710
7. López • DET .684
8. Travers • MIL .667
9. Leonard • KCR .645
10. Gura • KCR .643

Walks & Hits per IP

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

1. May • NYY 1.044
2. Norris • OAK 1.048
3. Burns • CHW 1.160
4. Langford • OAK 1.172
5. Eckersley • BOS 1.174
6. Haas • MIL 1.197
7. Bannister • SEA 1.222
8. Jenkins • TEX 1.222
9. Underwood • NYY 1.225
10. Schatzeder • DET 1.225

Hits per 9 IP

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

1. Norris • OAK 6.805
2. May • NYY 7.392
3. Clancy • TOR 7.791
4. Underwood • NYY 7.845
5. Keough • OAK 7.848
6. Gale • KCR 7.977
7. Stone • BAL 8.043
8. Burns • CHW 8.055
9. McCatty • OAK 8.202
10. Bannister • SEA 8.270

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. Matlack • TEX 1.841
2. Splittorff • KCR 1.897
3. John • NYY 1.899
4. Tanana • CAL 1.985
5. Langford • OAK 1.986
6. Haas • MIL 1.997
7. May • NYY 2.002
8. Eckersley • BOS 2.003
9. Abbott • SEA 2.051
10. Sorensen • MIL 2.070

Strikeouts per 9 IP

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

1. Barker • CLE 6.832
2. May • NYY 6.827
3. Guidry • NYY 6.801
4. Bannister • SEA 6.409
5. Perry • 2TM 5.908
6. Jenkins • TEX 5.864
7. Norris • OAK 5.698
8. Underwood • NYY 5.583
9. Koosman • MIN 5.511
10. Eckersley • BOS 5.509

Games Played

Games Played or Pitched

1. Quisenberry • KCR 75
2. Corbett • MIN 73
3. López • DET 67
Monge • CLE 67
5. Farmer • CHW 64
Gossage • NYY 64
Stoddard • BAL 64
8. Burgmeier • BOS 62
Proly • CHW 62
10. Garvin • TOR 61

Saves

Saves

1. Quisenberry • KCR 33
Gossage • NYY 33
3. Farmer • CHW 30
4. Stoddard • BAL 26
5. Burgmeier • BOS 24
6. Corbett • MIN 23
7. López • DET 21
8. Monge • CLE 14
Stanley • BOS 14
10. Rawley • SEA 13

Innings Pitched

Innings Pitched

1. Langford • OAK 290.0
2. Norris • OAK 284.1
3. Gura • KCR 283.1
4. Leonard • KCR 280.1
5. John • NYY 265.1
6. Haas • MIL 252.1
7. McGregor • BAL 252.0
8. Flanagan • BAL 251.1
9. Clancy • TOR 250.2
Stone • BAL 250.2

Strikeouts

Strikeouts

1. Barker • CLE 187
2. Norris • OAK 180
3. Guidry • NYY 166
4. Bannister • SEA 155
Leonard • KCR 155
6. Clancy • TOR 152
7. Koosman • MIN 149
Stone • BAL 149
9. Haas • MIL 146
10. Matlack • TEX 142

Games Started

Games Started

1. Leonard • KCR 38
2. Flanagan • BAL 37
Stone • BAL 37
4. Barker • CLE 36
Gura • KCR 36
John • NYY 36
McGregor • BAL 36
Morris • DET 36
9. Zahn • MIN 35
10. Clancy • TOR 34
Koosman • MIN 34
Matlack • TEX 34

Complete Games

Complete Game

1. Langford • OAK 28
2. Norris • OAK 24
3. Keough • OAK 20
4. Gura • KCR 16
John • NYY 16
6. Clancy • TOR 15
7. Haas • MIL 14
Stieb • TOR 14
9. Zahn • MIN 13
Wilcox • DET 13

Shutouts

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

1. John • NYY 6
2. Zahn • MIN 5
3. Gura • KCR 4
Stieb • TOR 4
McGregor • BAL 4
6. Petry • DET 3
Haas • MIL 3
Guidry • NYY 3
Leonard • KCR 3
10. Abbott • SEA 2
Morris • DET 2
Schatzeder • DET 2
Sorensen • MIL 2
Trout • CHW 2
Underwood • NYY 2
Waits • CLE 2
Langford • OAK 2
Keough • OAK 2
Perry • 2TM 2
Jefferson • TOR 2
Flanagan • BAL 2
Cleveland • MIL 2
Clancy • TOR 2
Caldwell • MIL 2

Home Runs

Home Runs Hit/Allowed

1. Leonard • KCR 30
2. Caldwell • MIL 29
Langford • OAK 29
4. Abbott • SEA 27
Flanagan • BAL 27
McCatty • OAK 27
7. Palmer • BAL 26
8. Eckersley • BOS 25
Haas • MIL 25
10. Bannister • SEA 24
Keough • OAK 24
Koosman • MIN 24
Wilcox • DET 24

Bases on Balls

Bases on Balls/Walks

1. Clancy • TOR 128
2. Stone • BAL 101
3. McCatty • OAK 99
4. Beattie • SEA 98
5. Keough • OAK 94
6. Barker • CLE 92
7. Dotson • CHW 87
Morris • DET 87
9. Norris • OAK 83
Petry • DET 83
Stieb • TOR 83

Hits

Hits/Hits Allowed

1. Flanagan • BAL 278
2. Langford • OAK 276
3. Zahn • MIN 273
4. Gura • KCR 272
5. Leonard • KCR 271
6. John • NYY 270
7. Matlack • TEX 265
8. Torrez • BOS 256
9. McGregor • BAL 254
10. Koosman • MIN 252
Morris • DET 252

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. May • NYY 3.410
2. Matlack • TEX 2.958
3. Eckersley • BOS 2.750
4. Haas • MIL 2.607
5. Tanana • CAL 2.511
6. Jenkins • TEX 2.481
7. Bannister • SEA 2.348
8. Norris • OAK 2.169
9. Koosman • MIN 2.159
10. Burns • CHW 2.111

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. John • NYY 0.441
2. Stieb • TOR 0.445
3. Petry • DET 0.492
4. Stanley • BOS 0.566
5. Norris • OAK 0.570
6. McGregor • BAL 0.571
7. Medich • TEX 0.573
8. Sorensen • MIL 0.598
9. Erickson • MIN 0.611
10. Perry • 2TM 0.613

Losses

Losses

1. Kingman • OAK 20
2. Zahn • MIN 18
3. Honeycutt • SEA 17
4. Clancy • TOR 16
Parrott • SEA 16
Torrez • BOS 16
Trout • CHW 16
8. Beattie • SEA 15
Haas • MIL 15
Morris • DET 15
Stieb • TOR 15

Earned Runs

Earned Runs Allowed

1. Leonard • KCR 118
2. Torrez • BOS 117
3. Morris • DET 116
4. Flanagan • BAL 115
5. Barker • CLE 114
Spillner • CLE 114
Zahn • MIN 114
8. Waits • CLE 111
9. Koosman • MIN 109
10. Langford • OAK 105

Wild Pitches

Wild Pitches

1. Barker • CLE 14
2. Keough • OAK 13
3. Flanagan • BAL 12
Leonard • KCR 12
5. Clancy • TOR 10
Spillner • CLE 10
7. Matlack • TEX 9
May • NYY 9
Norris • OAK 9
Rozema • DET 9
Torrez • BOS 9
Perry • 2TM 9

Hit By Pitch

Times Hit by a Pitch.

1. Trout • CHW 9
2. Knapp • CAL 8
McCatty • OAK 8
Tanana • CAL 8
Perry • 2TM 8
6. Stanley • BOS 7
7. Dotson • CHW 6
Garland • CLE 6
John • NYY 6
Norris • OAK 6
Stieb • TOR 6
Stone • BAL 6
Travers • MIL 6
Wilcox • DET 6

Batters Faced

Batters Faced

1. Gura • KCR 1,175
2. Leonard • KCR 1,172
3. Langford • OAK 1,166
4. Norris • OAK 1,135
5. John • NYY 1,089
6. Clancy • TOR 1,075
7. Morris • DET 1,074
8. Flanagan • BAL 1,065
9. Barker • CLE 1,052
10. Stone • BAL 1,048

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. Quisenberry • KCR 68
2. Corbett • MIN 63
3. López • DET 59
4. Gossage • NYY 58
5. Farmer • CHW 55
6. Stoddard • BAL 52
7. Monge • CLE 42
8. Clear • CAL 40
Cruz • CLE 40
10. Rawley • SEA 39

Adjusted ERA+

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

1. May • NYY 160
2. Norris • OAK 149
3. Burns • CHW 143
4. Gura • KCR 136
5. Erickson • MIN 135
6. Clancy • TOR 131
7. Keough • OAK 129
8. Stanley • BOS 125
9. Haas • MIL 125
10. Stone • BAL 123

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. May • NYY 2.94
2. Matlack • TEX 3.10
3. Norris • OAK 3.25
4. Barker • CLE 3.29
5. McGregor • BAL 3.35
6. Perry • 2TM 3.37
7. Burns • CHW 3.41
8. Guidry • NYY 3.47
9. John • NYY 3.50
10. Medich • TEX 3.55

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. Norris • OAK 43
2. Corbett • MIN 35
3. Burns • CHW 32
4. Gura • KCR 32
5. May • NYY 28
6. Clancy • TOR 25
7. Keough • OAK 24
8. Haas • MIL 23
9. Burgmeier • BOS 21
10. Stone • 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. Norris • OAK 4.6
2. Corbett • MIN 3.6
3. Burns • CHW 3.4
4. Gura • KCR 3.4
5. May • NYY 2.9
6. Clancy • TOR 2.6
7. Keough • OAK 2.5
8. Haas • MIL 2.4
9. Burgmeier • BOS 2.2
10. McGregor • BAL 2.0
Erickson • MIN 2.0
Stone • BAL 2.0

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. Norris • OAK 49.43
2. Corbett • MIN 45.48
3. Burns • CHW 35.08
4. Gura • KCR 31.91
5. May • NYY 31.77
6. McGregor • BAL 28.79
7. Haas • MIL 28.54
8. Burgmeier • BOS 27.92
9. Quisenberry • KCR 26.93
10. Keough • OAK 25.78

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. Corbett • MIN 7.8
2. Quisenberry • KCR 7.0
3. Norris • OAK 6.7
4. Burgmeier • BOS 5.4
5. Gossage • NYY 5.0
6. Burns • CHW 4.1
7. John • NYY 3.4
8. Gura • KCR 3.1
9. Hassler • CAL 3.1
10. McGregor • BAL 2.9

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. Norris • OAK 5.3
2. Corbett • MIN 3.5
3. May • NYY 3.4
4. Burns • CHW 2.8
5. Langford • OAK 2.7
6. John • NYY 2.6
7. Gura • KCR 2.6
8. McGregor • BAL 2.3
9. Stone • BAL 2.3
10. Keough • OAK 2.1

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. Gossage • NYY 8.8
2. Quisenberry • KCR 6.1
3. May • NYY 5.1
4. Burgmeier • BOS 4.0
5. McGregor • BAL 3.9
6. Gura • KCR 3.6
7. John • NYY 3.5
8. Stone • BAL 3.5
9. Norris • OAK 3.5
10. Guidry • NYY 2.6

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. Norris • OAK 5.6
2. Corbett • MIN 4.5
3. Burns • CHW 3.7
4. May • NYY 3.4
Gura • KCR 3.4
6. Haas • MIL 3.1
7. McGregor • BAL 3.0
8. Keough • OAK 2.8
9. Burgmeier • BOS 2.8
10. Quisenberry • KCR 2.8

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