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. Clemens • BOS 10.4
2. Henderson • OAK 9.9
3. Finley • CAL 7.7
4. Ripken • BAL 7.5
5. Franco • TEX 6.8
6. Trammell • DET 6.7
7. Fielder • DET 6.5
8. Boddicker • BOS 5.9
9. Stieb • TOR 5.9
10. McGwire • OAK 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. Clemens • BOS 10.4
2. Finley • CAL 7.7
3. Boddicker • BOS 5.9
4. Stieb • TOR 5.9
5. Appier • KCR 5.3
6. Stewart • OAK 5.2
7. Hanson • SEA 5.0
8. Farr • KCR 4.8
9. Wells • TOR 4.3
10. Hibbard • CHW 3.7

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. Clemens • BOS 1.93
2. Finley • CAL 2.40
3. Stewart • OAK 2.56
4. Appier • KCR 2.76
5. Stieb • TOR 2.93
6. Welch • OAK 2.95
7. Wells • TOR 3.14
8. Hibbard • CHW 3.16
9. Hanson • SEA 3.24
10. McCaskill • CAL 3.25

Wins

Wins

1. Welch • OAK 27
2. Stewart • OAK 22
3. Clemens • BOS 21
4. Finley • CAL 18
Hanson • SEA 18
Stieb • TOR 18
7. Boddicker • BOS 17
Sanderson • OAK 17
Witt • TEX 17
10. Candiotti • CLE 15
Morris • DET 15

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. Welch • OAK .818
2. Clemens • BOS .778
3. Stieb • TOR .750
King • CHW .750
5. Robinson • MIL .706
6. Boddicker • BOS .680
7. Stewart • OAK .667
Finley • CAL .667
Hanson • SEA .667
10. Key • TOR .650
Farr • KCR .650

Walks & Hits per IP

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

1. Ryan • TEX 1.034
2. Clemens • BOS 1.082
3. Wells • TOR 1.111
4. Hanson • SEA 1.157
5. Stewart • OAK 1.157
6. Stieb • TOR 1.165
7. Black • 2TM 1.171
8. Hibbard • CHW 1.218
9. Welch • OAK 1.223
10. Finley • CAL 1.233

Hits per 9 IP

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

1. Ryan • TEX 6.044
2. Johnson • SEA 7.129
3. Clemens • BOS 7.607
4. Stewart • OAK 7.618
5. Stieb • TOR 7.720
6. Hanson • SEA 7.818
7. Hough • TEX 7.820
8. Wells • TOR 7.857
9. Black • 2TM 7.882
10. Young • SEA 7.908

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. Anderson • MIN 1.860
2. Swindell • CLE 1.970
3. Clemens • BOS 2.128
4. Knudson • MIL 2.139
5. Wells • TOR 2.143
6. Johnson • BAL 2.150
7. Hibbard • CHW 2.346
8. Candiotti • CLE 2.450
9. Hanson • SEA 2.593
10. Appier • KCR 2.618

Strikeouts per 9 IP

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

1. Ryan • TEX 10.235
2. Witt • TEX 8.959
3. Clemens • BOS 8.238
4. Gordon • KCR 8.063
5. Hanson • SEA 8.047
6. Johnson • SEA 7.948
7. Langston • CAL 7.870
8. Perez • CHW 7.355
9. McDowell • CHW 7.244
10. Young • SEA 7.030

Games Played

Games Played or Pitched

1. Thigpen • CHW 77
2. Montgomery • KCR 73
Ward • TOR 73
4. Henneman • DET 69
Rogers • TEX 69
6. Murphy • BOS 68
7. Crim • MIL 67
8. Jones • CLE 66
Plesac • MIL 66
10. Jones • CHW 65

Saves

Saves

1. Thigpen • CHW 57
2. Eckersley • OAK 48
3. Jones • CLE 43
4. Olson • BAL 37
5. Righetti • NYY 36
6. Aguilera • MIN 32
Henke • TOR 32
8. Schooler • SEA 30
9. Harvey • CAL 25
10. Montgomery • KCR 24
Plesac • MIL 24

Innings Pitched

Innings Pitched

1. Stewart • OAK 267.0
2. Morris • DET 249.2
3. Welch • OAK 238.0
4. Finley • CAL 236.0
Hanson • SEA 236.0
6. Clemens • BOS 228.1
7. Boddicker • BOS 228.0
8. Young • SEA 225.1
9. Langston • CAL 223.0
10. Witt • TEX 222.0

Strikeouts

Strikeouts

1. Ryan • TEX 232
2. Witt • TEX 221
3. Hanson • SEA 211
4. Clemens • BOS 209
5. Langston • CAL 195
6. Johnson • SEA 194
7. Finley • CAL 177
8. Young • SEA 176
9. Gordon • KCR 175
10. Stewart • OAK 166

Games Started

Games Started

1. Morris • DET 36
Stewart • OAK 36
3. Perez • CHW 35
Welch • OAK 35
5. Boddicker • BOS 34
Sanderson • OAK 34
Swindell • CLE 34
8. Abbott • CAL 33
Hanson • SEA 33
Hibbard • CHW 33
Johnson • SEA 33
Langston • CAL 33
McDowell • CHW 33
Moore • OAK 33
Stieb • TOR 33
Stottlemyre • TOR 33
Young • SEA 33

Complete Games

Complete Game

1. Morris • DET 11
Stewart • OAK 11
3. Robinson • MIL 7
Finley • CAL 7
Witt • TEX 7
Clemens • BOS 7
Young • SEA 7
8. Brown • TEX 6
Leary • NYY 6
Gordon • KCR 6

Shutouts

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

1. Clemens • BOS 4
Stewart • OAK 4
3. Perez • CHW 3
Appier • KCR 3
Morris • DET 3
6. Stieb • TOR 2
McDonald • BAL 2
Robinson • MIL 2
Ryan • TEX 2
Knudson • MIL 2
King • CHW 2
Johnson • SEA 2
Welch • OAK 2
Finley • CAL 2
Brown • TEX 2
Black • 2TM 2

Home Runs

Home Runs Hit/Allowed

1. Johnson • BAL 30
2. Sanderson • OAK 27
Swindell • CLE 27
4. Johnson • SEA 26
Morris • DET 26
Welch • OAK 26
7. Tanana • DET 25
8. Hough • TEX 24
9. Candiotti • CLE 23
Cerutti • TOR 23
Robinson • DET 23

Bases on Balls

Bases on Balls/Walks

1. Johnson • SEA 120
2. Hough • TEX 119
3. Witt • TEX 110
4. Young • SEA 107
5. Langston • CAL 104
6. Gordon • KCR 99
7. Morris • DET 97
8. Robinson • DET 88
9. Harnisch • BAL 86
Perez • CHW 86

Hits

Hits/Hits Allowed

1. Abbott • CAL 246
2. Swindell • CLE 245
3. Morris • DET 231
4. Stewart • OAK 226
5. Boddicker • BOS 225
6. Langston • CAL 215
7. Anderson • MIN 214
Stottlemyre • TOR 214
Welch • OAK 214
10. Finley • CAL 210

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. Clemens • BOS 3.870
2. Ryan • TEX 3.135
3. Hanson • SEA 3.103
4. Swindell • CLE 2.872
5. Higuera • MIL 2.580
6. Wells • TOR 2.556
7. Appier • KCR 2.352
8. Candiotti • CLE 2.327
9. Finley • CAL 2.185
10. McDowell • CHW 2.143

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. Clemens • BOS 0.276
2. McCaskill • CAL 0.465
3. Hibbard • CHW 0.469
4. Stieb • TOR 0.474
5. Witt • TEX 0.486
6. Langston • CAL 0.525
7. Stewart • OAK 0.539
8. Hanson • SEA 0.572
9. Young • SEA 0.599
10. Appier • KCR 0.630

Losses

Losses

1. Leary • NYY 19
2. Anderson • MIN 18
Morris • DET 18
Young • SEA 18
5. Langston • CAL 17
Stottlemyre • TOR 17
7. Moore • OAK 15
8. Abbott • CAL 14
Perez • CHW 14
10. Cary • NYY 12
Hawkins • NYY 12
Hough • TEX 12

Earned Runs

Earned Runs Allowed

1. Morris • DET 125
2. Langston • CAL 109
3. Abbott • CAL 106
4. Swindell • CLE 105
5. Tanana • DET 104
6. Moore • OAK 103
7. Perez • CHW 101
8. Hough • TEX 99
9. Stottlemyre • TOR 98
10. Robinson • DET 96

Wild Pitches

Wild Pitches

1. Leary • NYY 23
2. Morris • DET 16
Robinson • DET 16
Young • SEA 16
5. Cadaret • NYY 14
6. Moore • OAK 13
7. Cary • NYY 11
Gordon • KCR 11
Witt • TEX 11
10. Boddicker • BOS 10
Hanson • SEA 10
Petry • DET 10
Smith • MIN 10

Hit By Pitch

Times Hit by a Pitch.

1. Hough • TEX 11
2. Boddicker • BOS 10
Stieb • TOR 10
4. Kiecker • BOS 9
Tanana • DET 9
6. Stottlemyre • TOR 8
Terrell • DET 8
8. Blyleven • CAL 7
Clemens • BOS 7
Leary • NYY 7
McDowell • CHW 7
Ryan • TEX 7
Swift • SEA 7

Batters Faced

Batters Faced

1. Stewart • OAK 1,088
2. Morris • DET 1,073
3. Welch • OAK 979
4. Hanson • SEA 964
5. Young • SEA 963
6. Finley • CAL 962
7. Boddicker • BOS 956
8. Witt • TEX 954
9. Hough • TEX 950
Langston • CAL 950

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. Thigpen • CHW 73
2. Jones • CLE 64
3. Eckersley • OAK 61
4. Montgomery • KCR 59
5. Henke • TOR 58
Olson • BAL 58
7. Aguilera • MIN 54
8. Henneman • DET 53
9. Plesac • MIL 52
10. Harvey • CAL 47
Righetti • NYY 47

Adjusted ERA+

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

1. Clemens • BOS 211
2. Finley • CAL 158
3. Stewart • OAK 144
4. Stieb • TOR 140
5. Appier • KCR 139
6. Wells • TOR 131
7. Welch • OAK 125
8. Hibbard • CHW 122
9. Boddicker • BOS 122
10. Hanson • SEA 121

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. Clemens • BOS 2.18
2. Hanson • SEA 2.74
3. Ryan • TEX 2.87
4. Witt • TEX 3.06
5. Langston • CAL 3.28
6. Finley • CAL 3.30
7. Wells • TOR 3.30
8. Appier • KCR 3.32
9. Stewart • OAK 3.33
10. Stieb • TOR 3.36

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. Clemens • BOS 50
2. Stewart • OAK 36
3. Finley • CAL 35
4. Stieb • TOR 27
5. Farr • KCR 26
6. Eckersley • OAK 25
7. Appier • KCR 21
8. Hanson • SEA 21
9. Thigpen • CHW 20
10. Wells • TOR 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. Clemens • BOS 5.7
2. Stewart • OAK 3.9
3. Finley • CAL 3.8
4. Stieb • TOR 2.9
5. Farr • KCR 2.8
6. Eckersley • OAK 2.6
7. Appier • KCR 2.2
8. Hanson • SEA 2.2
9. Thigpen • CHW 2.1
10. Wells • TOR 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. Clemens • BOS 56.42
2. Stewart • OAK 38.94
3. Finley • CAL 35.52
4. Farr • KCR 33.01
5. Stieb • TOR 28.39
6. Eckersley • OAK 27.91
7. Thigpen • CHW 26.91
8. Wells • TOR 26.57
9. Hanson • SEA 26.21
10. Boddicker • BOS 24.97

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. Clemens • BOS 7.1
2. Eckersley • OAK 5.1
3. Stewart • OAK 4.4
4. Finley • CAL 4.4
5. Thigpen • CHW 4.1
6. Hanson • SEA 3.8
Stieb • TOR 3.8
8. Welch • OAK 3.1
9. Hibbard • CHW 3.0
10. Wells • TOR 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. Clemens • BOS 4.8
2. Stewart • OAK 4.2
3. Stieb • TOR 3.4
4. Hanson • SEA 3.2
5. Eckersley • OAK 3.1
6. Wells • TOR 2.9
7. Ryan • TEX 2.2
8. Finley • CAL 2.1
9. Welch • OAK 2.1
10. Farr • KCR 2.0

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. Clemens • BOS 15.3
2. Boddicker • BOS 7.4
3. Eckersley • OAK 5.7
4. Kiecker • BOS 4.8
5. Stewart • OAK 4.2
6. Wells • TOR 4.1
7. Reardon • BOS 3.8
8. Stieb • TOR 3.6
9. Welch • OAK 3.6
10. Hibbard • CHW 3.6

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. Clemens • BOS 6.3
2. Stewart • OAK 4.4
3. Finley • CAL 3.9
4. Farr • KCR 3.5
5. Eckersley • OAK 3.0
6. Stieb • TOR 3.0
7. Thigpen • CHW 2.8
8. Hanson • SEA 2.8
9. Wells • TOR 2.7
10. Boddicker • BOS 2.6

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