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. Rodriguez • TEX 8.8
2. Thome • CLE 7.4
3. Lowe • BOS 7.3
4. Halladay • TOR 7.2
5. Zito • OAK 7.1
6. Giambi • NYY 7.1
7. Hudson • OAK 7.0
8. Garciaparra • BOS 6.8
9. Martínez • BOS 6.4
10. Erstad • ANA 6.3

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. Halladay • TOR 7.3
2. Lowe • BOS 7.2
3. Zito • OAK 7.2
4. Hudson • OAK 6.9
5. Martínez • BOS 6.5
6. Moyer • SEA 5.6
7. Byrd • KCR 5.6
8. Buehrle • CHW 5.0
9. Rogers • TEX 4.9
10. Colón • CLE 4.7

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. Martínez • BOS 2.26
2. Lowe • BOS 2.58
3. Zito • OAK 2.75
4. Wakefield • BOS 2.81
5. Halladay • TOR 2.93
6. Hudson • OAK 2.98
7. Washburn • ANA 3.15
8. Piñeiro • SEA 3.24
9. Moyer • SEA 3.32
10. Mulder • OAK 3.47

Wins

Wins

1. Zito • OAK 23
2. Lowe • BOS 21
3. Martínez • BOS 20
4. Buehrle • CHW 19
Halladay • TOR 19
Mulder • OAK 19
Wells • NYY 19
8. Mussina • NYY 18
Washburn • ANA 18
10. Byrd • KCR 17

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. Martínez • BOS .833
2. Zito • OAK .821
3. Washburn • ANA .750
4. Mulder • OAK .731
Halladay • TOR .731
Wells • NYY .731
7. Lowe • BOS .724
8. Pettitte • NYY .722
9. Wakefield • BOS .688
10. Clemens • NYY .684

Walks & Hits per IP

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

1. Martínez • BOS 0.923
2. Lowe • BOS 0.974
3. Wakefield • BOS 1.053
4. Moyer • SEA 1.075
5. Zito • OAK 1.134
6. Mulder • OAK 1.143
7. Byrd • KCR 1.147
8. Reed • MIN 1.160
9. Washburn • ANA 1.175
10. Ortiz • ANA 1.178

Hits per 9 IP

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

1. Martínez • BOS 6.502
2. Wakefield • BOS 6.667
3. Lowe • BOS 6.801
4. Zito • OAK 7.142
5. Moyer • SEA 7.725
6. Ortiz • ANA 7.785
7. López • BAL 7.871
8. Mulder • OAK 7.900
9. Washburn • ANA 7.995
10. Halladay • TOR 8.386

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. Reed • MIN 1.245
2. Byrd • KCR 1.498
3. Milton • MIN 1.579
4. Martínez • BOS 1.806
5. Lidle • OAK 1.828
6. Moyer • SEA 1.951
7. Wells • NYY 1.963
8. Lowe • BOS 1.967
9. Mussina • NYY 2.003
10. Valdez • 2TM 2.158

Strikeouts per 9 IP

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

1. Martínez • BOS 10.791
2. Clemens • NYY 9.600
3. Mussina • NYY 7.595
4. Wakefield • BOS 7.384
5. García • SEA 7.283
6. Zito • OAK 7.142
7. Báez • CLE 7.077
8. Mulder • OAK 6.902
9. Ortiz • ANA 6.709
10. Burkett • BOS 6.451

Games Played

Games Played or Pitched

1. Koch • OAK 84
2. Romero • MIN 81
3. Stanton • NYY 79
4. Karsay • NYY 78
5. Escobar • TOR 76
6. Bradford • OAK 75
7. Rincón • 2TM 71
8. Grimsley • KCR 70
Groom • BAL 70
10. Guardado • MIN 68
Marte • CHW 68

Saves

Saves

1. Guardado • MIN 45
2. Koch • OAK 44
3. Percival • ANA 40
Urbina • BOS 40
5. Escobar • TOR 38
6. Sasaki • SEA 37
7. Acevedo • DET 28
Rivera • NYY 28
9. Hernández • KCR 26
10. Julio • BAL 25

Innings Pitched

Innings Pitched

1. Halladay • TOR 239.1
2. Buehrle • CHW 239.0
3. Hudson • OAK 238.1
4. Moyer • SEA 230.2
5. Zito • OAK 229.1
6. Byrd • KCR 228.1
7. Sturtze • TBD 224.0
8. García • SEA 223.2
9. Lowe • BOS 219.2
10. Ortiz • ANA 217.1

Strikeouts

Strikeouts

1. Martínez • BOS 239
2. Clemens • NYY 192
3. Mussina • NYY 182
Zito • OAK 182
5. García • SEA 181
6. Halladay • TOR 168
7. Ortiz • ANA 162
8. Mulder • OAK 159
9. Hudson • OAK 152
10. Sabathia • CLE 149

Games Started

Games Started

1. Zito • OAK 35
2. Buehrle • CHW 34
García • SEA 34
Halladay • TOR 34
Hudson • OAK 34
Moyer • SEA 34
7. Byrd • KCR 33
Garland • CHW 33
Mussina • NYY 33
Rogers • TEX 33
Sabathia • CLE 33
Sturtze • TBD 33
Suppan • KCR 33
Wright • CHW 33

Complete Games

Complete Game

1. Byrd • KCR 7
2. Buehrle • CHW 5
Kennedy • TBD 5
4. Moyer • SEA 4
Sturtze • TBD 4
Ortiz • ANA 4
Hudson • OAK 4
Colón • CLE 4
9. Suppan • KCR 3
Sparks • DET 3
Loaiza • TOR 3
Pettitte • NYY 3
Ponson • BAL 3
Redman • DET 3
Erickson • BAL 3
Weaver • 2TM 3

Shutouts

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

1. Weaver • 2TM 3
2. Moyer • SEA 2
Mussina • NYY 2
Buehrle • CHW 2
Lidle • OAK 2
Hudson • OAK 2
Colón • CLE 2
Byrd • KCR 2
9. Ortiz • ANA 1
Halladay • TOR 1
Garland • CHW 1
Mulder • OAK 1
Milton • MIN 1
Mays • MIN 1
May • KCR 1
Lowe • BOS 1
Lohse • MIN 1
Loaiza • TOR 1
Davis • TEX 1
Kennedy • TBD 1
Erickson • BAL 1
Pettitte • NYY 1
Piñeiro • SEA 1
Radke • MIN 1
Reed • MIN 1
Rogers • TEX 1
Sele • ANA 1
Suppan • KCR 1
Van Hekken • DET 1
Wells • NYY 1
Wright • CHW 1
Lilly • 2TM 1
Burkett • BOS 1
Oliver • BOS 1

Home Runs

Home Runs Hit/Allowed

1. Ortiz • ANA 40
2. Byrd • KCR 36
3. Sturtze • TBD 33
4. Reed • MIN 32
Suppan • KCR 32
Wright • CHW 32
7. García • SEA 30
8. Wilson • TBD 29
9. May • KCR 28
Moyer • SEA 28

Bases on Balls

Bases on Balls/Walks

1. Sturtze • TBD 89
2. Sabathia • CLE 88
3. Garland • CHW 83
4. Báez • CLE 82
5. Park • TEX 78
Zito • OAK 78
7. Wright • CHW 71
8. Lohse • MIN 70
Rogers • TEX 70
10. Erickson • BAL 68
Ortiz • ANA 68
Suppan • KCR 68
Zambrano • TBD 68

Hits

Hits/Hits Allowed

1. Sturtze • TBD 271
2. Sparks • DET 238
3. Hudson • OAK 237
4. Buehrle • CHW 236
5. Suppan • KCR 229
6. García • SEA 227
7. Byrd • KCR 224
8. Halladay • TOR 223
9. Wilson • TBD 219
10. Rogers • TEX 212

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. Martínez • BOS 5.975
2. Reed • MIN 4.654
3. Milton • MIN 4.033
4. Mussina • NYY 3.792
5. Byrd • KCR 3.395
6. Clemens • NYY 3.048
7. Wells • NYY 3.044
8. Moyer • SEA 2.940
9. Mulder • OAK 2.891
10. García • SEA 2.873

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. Halladay • TOR 0.376
2. Lowe • BOS 0.492
3. Martínez • BOS 0.587
4. Redman • DET 0.665
5. Hudson • OAK 0.717
6. Weaver • 2TM 0.721
7. Sabathia • CLE 0.729
8. Báez • CLE 0.762
9. Lidle • OAK 0.797
10. Wakefield • BOS 0.827

Losses

Losses

1. Sturtze • TBD 18
2. Sparks • DET 16
Suppan • KCR 16
4. Castillo • BOS 15
Redman • DET 15
Ritchie • CHW 15
7. Johnson • BAL 14
8. Appier • ANA 12
Buehrle • CHW 12
Erickson • BAL 12
Garland • CHW 12
Wilson • TBD 12
Wright • CHW 12
Valdez • 2TM 12

Earned Runs

Earned Runs Allowed

1. Sturtze • TBD 129
2. Suppan • KCR 123
3. Sparks • DET 116
4. Wright • CHW 113
5. García • SEA 109
6. Wilson • TBD 104
7. Sabathia • CLE 102
8. Drese • CLE 100
9. Byrd • KCR 99
Erickson • BAL 99
Kennedy • TBD 99

Wild Pitches

Wild Pitches

1. Santana • MIN 15
2. Clemens • NYY 14
3. Drese • CLE 11
Redman • DET 11
5. Ritchie • CHW 10
Suppan • KCR 10
Wright • CHW 10
Zambrano • TBD 10
9. Park • TEX 9
Romero • MIN 9
Burba • 2TM 9

Hit By Pitch

Times Hit by a Pitch.

1. Park • TEX 17
2. Kennedy • TBD 16
3. Martínez • BOS 15
4. Wilson • TBD 13
5. Lowe • BOS 12
Sparks • DET 12
7. Miller • TOR 11
Mulder • OAK 11
Weaver • 2TM 11
10. Rupe • TBD 10

Batters Faced

Batters Faced

1. Sturtze • TBD 1,008
2. Halladay • TOR 993
3. Buehrle • CHW 984
4. Hudson • OAK 983
5. García • SEA 955
6. Zito • OAK 939
7. Byrd • KCR 935
8. Moyer • SEA 931
9. Suppan • KCR 912
10. Ortiz • ANA 896

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. Koch • OAK 79
2. Escobar • TOR 68
3. Guardado • MIN 62
4. Julio • BAL 61
5. Sasaki • SEA 55
Urbina • BOS 55
7. Percival • ANA 50
8. Acevedo • DET 48
9. Yan • TBD 47
10. Hernández • KCR 42

Adjusted ERA+

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

1. Martínez • BOS 202
2. Lowe • BOS 177
3. Wakefield • BOS 162
4. Zito • OAK 158
5. Halladay • TOR 157
6. Hudson • OAK 145
7. Washburn • ANA 141
8. Piñeiro • SEA 131
9. Moyer • SEA 128
10. Byrd • KCR 127

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. Martínez • BOS 2.24
2. Halladay • TOR 2.97
3. Clemens • NYY 3.30
4. Lowe • BOS 3.34
5. Weaver • 2TM 3.57
6. Hudson • OAK 3.60
7. Wakefield • BOS 3.62
8. Mussina • NYY 3.64
9. Lidle • OAK 3.66
10. Wells • NYY 3.68

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. Lowe • BOS 49
2. Martínez • BOS 47
3. Zito • OAK 40
4. Halladay • TOR 39
5. Hudson • OAK 36
6. Washburn • ANA 31
7. Wakefield • BOS 30
8. Moyer • SEA 27
9. Buehrle • CHW 25
10. Romero • MIN 24

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. Lowe • BOS 5.1
2. Martínez • BOS 4.9
3. Zito • OAK 4.2
4. Halladay • TOR 4.1
5. Hudson • OAK 3.7
6. Washburn • ANA 3.2
7. Wakefield • BOS 3.0
8. Moyer • SEA 2.7
9. Buehrle • CHW 2.5
10. Colón • CLE 2.5

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. Lowe • BOS 55.50
2. Martínez • BOS 47.54
3. Zito • OAK 45.49
4. Halladay • TOR 39.01
5. Hudson • OAK 38.45
6. Washburn • ANA 38.29
7. Moyer • SEA 34.17
8. Wakefield • BOS 32.58
9. Buehrle • CHW 29.90
10. Romero • MIN 26.79

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. Koch • OAK 4.6
2. Romero • MIN 4.4
3. Percival • ANA 4.4
4. Martínez • BOS 4.1
5. Lowe • BOS 4.0
6. Washburn • ANA 4.0
7. Zito • OAK 3.9
8. Halladay • TOR 3.9
9. Hudson • OAK 3.5
10. Groom • BAL 3.4

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. Lowe • BOS 5.7
2. Martínez • BOS 5.0
3. Halladay • TOR 3.9
4. Moyer • SEA 3.6
5. Zito • OAK 3.6
6. Washburn • ANA 3.6
7. Hudson • OAK 3.3
8. Buehrle • CHW 2.8
9. Mulder • OAK 2.8
10. Wakefield • BOS 2.7

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. Percival • ANA 3.7
2. Martínez • BOS 3.7
3. Koch • OAK 3.4
4. Lowe • BOS 3.2
5. Washburn • ANA 2.7
6. Zito • OAK 2.6
7. Moyer • SEA 2.5
8. Piñeiro • SEA 2.2
9. Karsay • NYY 2.0
10. Appier • ANA 1.9

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. Lowe • BOS 5.8
2. Martínez • BOS 4.9
3. Zito • OAK 4.8
4. Hudson • OAK 4.0
5. Washburn • ANA 4.0
6. Halladay • TOR 3.9
7. Moyer • SEA 3.6
8. Wakefield • BOS 3.2
9. Buehrle • CHW 3.0
10. Colón • 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 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