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. Johnson • WSH 11.8
2. Coveleski • CLE 9.5
3. Perry • PHA 7.6
4. Ruth • BOS 7.0
5. Sisler • SLB 6.6
6. Cobb • DET 6.4
7. Speaker • CLE 5.8
8. Burns • PHA 5.7
9. Baker • NYY 4.8
10. Hooper • BOS 4.8

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. Johnson • WSH 10.5
2. Coveleski • CLE 9.9
3. Perry • PHA 8.3
4. Bagby • CLE 4.3
5. Harper • WSH 4.3
6. Mogridge • NYY 4.2
7. Sothoron • SLB 4.2
8. Boland • DET 4.1
9. Cicotte • CHW 3.6
10. Mays • BOS 3.5

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. Johnson • WSH 1.27
2. Coveleski • CLE 1.82
3. Sothoron • SLB 1.94
4. Perry • PHA 1.98
5. Bush • BOS 2.11
6. Harper • WSH 2.18
7. Mogridge • NYY 2.18
8. Mays • BOS 2.21
9. Ruth • BOS 2.22
10. Jones • BOS 2.25

Wins

Wins

1. Johnson • WSH 23
2. Coveleski • CLE 22
3. Mays • BOS 21
4. Perry • PHA 20
5. Bagby • CLE 17
6. Mogridge • NYY 16
Jones • BOS 16
Shaw • WSH 16
9. Bush • BOS 15
10. Morton • CLE 14
Boland • DET 14

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. Jones • BOS .762
2. Ruth • BOS .650
Coumbe • CLE .650
4. Johnson • WSH .639
5. Morton • CLE .636
6. Coveleski • CLE .629
7. Mays • BOS .618
8. Boland • DET .583
9. Leonard • BOS .571
Shaw • WSH .571
Gallia • SLB .571

Walks & Hits per IP

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

1. Johnson • WSH 0.954
2. Ruth • BOS 1.046
3. Sothoron • SLB 1.048
4. Mays • BOS 1.060
5. Coveleski • CLE 1.084
6. Mogridge • NYY 1.149
7. Enzmann • CLE 1.163
8. Harper • WSH 1.172
9. Cicotte • CHW 1.184
10. Boland • DET 1.191

Hits per 9 IP

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

1. Sothoron • SLB 6.545
2. Johnson • WSH 6.653
3. Harper • WSH 6.713
4. Ruth • BOS 6.764
5. Mays • BOS 7.057
6. Jones • BOS 7.386
7. Shaw • WSH 7.496
8. Coveleski • CLE 7.553
9. Boland • DET 7.765
10. Morton • CLE 7.924

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. Cicotte • CHW 1.353
2. Mogridge • NYY 1.617
3. Benz • CHW 1.636
4. Enzmann • CLE 1.910
5. Johnson • WSH 1.933
6. Dauss • DET 2.091
7. Coveleski • CLE 2.199
8. Cunningham • DET 2.443
9. Mays • BOS 2.485
10. Ayers • WSH 2.581

Strikeouts per 9 IP

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

1. Morton • CLE 5.157
2. Shaw • WSH 4.811
3. Johnson • WSH 4.472
4. Bush • BOS 4.126
5. Love • NYY 3.739
6. Cicotte • CHW 3.519
7. Mays • BOS 3.498
8. Kallio • DET 3.474
9. Russell • NYY 3.447
10. Danforth • CHW 3.108

Games Played

Games Played or Pitched

1. Bagby • CLE 45
Mogridge • NYY 45
3. Perry • PHA 44
4. Shaw • WSH 41
5. Ayers • WSH 40
6. Danforth • CHW 39
Johnson • WSH 39
8. Cicotte • CHW 38
Coveleski • CLE 38
Love • NYY 38

Saves

Saves

1. Mogridge • NYY 7
2. Bagby • CLE 6
3. Russell • NYY 4
Geary • PHA 4
5. Ayers • WSH 3
Coumbe • CLE 3
Johnson • WSH 3
Dauss • DET 3
9. Perry • PHA 2
Rogers • SLB 2
Houck • SLB 2
Gregg • PHA 2
Shellenback • CHW 2
Shocker • SLB 2
Enzmann • CLE 2
Danforth • CHW 2
Cicotte • CHW 2
Bush • BOS 2

Innings Pitched

Innings Pitched

1. Perry • PHA 332.1
2. Johnson • WSH 326.0
3. Coveleski • CLE 311.0
4. Mays • BOS 293.1
5. Bush • BOS 272.2
6. Bagby • CLE 271.1
7. Cicotte • CHW 266.0
8. Dauss • DET 249.2
9. Harper • WSH 244.0
10. Shaw • WSH 241.1

Strikeouts

Strikeouts

1. Johnson • WSH 162
2. Shaw • WSH 129
3. Bush • BOS 125
4. Morton • CLE 123
5. Mays • BOS 114
6. Cicotte • CHW 104
7. Love • NYY 95
8. Coveleski • CLE 87
9. Perry • PHA 81
10. Harper • WSH 78

Games Started

Games Started

1. Perry • PHA 36
2. Mays • BOS 33
Coveleski • CLE 33
4. Harper • WSH 32
5. Bagby • CLE 31
Bush • BOS 31
7. Shaw • WSH 30
Cicotte • CHW 30
9. Love • NYY 29
Johnson • WSH 29

Complete Games

Complete Game

1. Perry • PHA 30
Mays • BOS 30
3. Johnson • WSH 29
4. Bush • BOS 26
5. Coveleski • CLE 25
6. Cicotte • CHW 24
7. Bagby • CLE 23
8. Dauss • DET 21
9. Ruth • BOS 18
10. Gregg • PHA 17

Shutouts

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

1. Mays • BOS 8
Johnson • WSH 8
3. Bush • BOS 7
4. Jones • BOS 5
5. Ayers • WSH 4
Boland • DET 4
Shaw • WSH 4
8. Perry • PHA 3
Leonard • BOS 3
Harper • WSH 3
Gregg • PHA 3
Watson • PHA 3

Home Runs

Home Runs Hit/Allowed

1. Finneran • 2TM 7
2. Mogridge • NYY 6
Russell • NYY 6
4. Myers • PHA 4
Coumbe • CLE 4
Gregg • PHA 4
7. Love • NYY 3
Sothoron • SLB 3
Bush • BOS 3
Dauss • DET 3
James • DET 3
Rogers • SLB 3
Faber • CHW 3

Bases on Balls

Bases on Balls/Walks

1. Love • NYY 116
2. Perry • PHA 111
3. Harper • WSH 104
4. Adams • PHA 97
5. Bush • BOS 91
6. Shaw • WSH 90
7. Mays • BOS 81
8. Bagby • CLE 78
9. Morton • CLE 77
10. Kallio • DET 76
Coveleski • CLE 76

Hits

Hits/Hits Allowed

1. Perry • PHA 295
2. Cicotte • CHW 275
3. Bagby • CLE 274
4. Coveleski • CLE 261
5. Dauss • DET 243
6. Johnson • WSH 241
Bush • BOS 241
8. Mogridge • NYY 232
9. Mays • BOS 230
10. Ayers • WSH 215

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. Cicotte • CHW 2.600
2. Johnson • WSH 2.314
3. Morton • CLE 1.597
4. Mogridge • NYY 1.442
5. Shaw • WSH 1.433
6. Mays • BOS 1.407
7. Bush • BOS 1.374
8. Enzmann • CLE 1.310
9. Dauss • DET 1.259
10. Danforth • CHW 1.200

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. Cunningham • DET 0.000
Kallio • DET 0.000
Davenport • SLB 0.000
Watson • PHA 0.000
Bagby • CLE 0.000
6. Perry • PHA 0.027
7. Harper • WSH 0.037
8. Morton • CLE 0.042
9. Boland • DET 0.044
10. Jones • BOS 0.049

Losses

Losses

1. Perry • PHA 19
Cicotte • CHW 19
3. Bagby • CLE 16
Dauss • DET 16
5. Bush • BOS 15
Danforth • CHW 15
7. Gregg • PHA 14
8. Johnson • WSH 13
Kallio • DET 13
Mogridge • NYY 13
Mays • BOS 13
Coveleski • CLE 13

Earned Runs

Earned Runs Allowed

1. Adams • PHA 83
Dauss • DET 83
3. Cicotte • CHW 82
4. Bagby • CLE 81
5. Love • NYY 78
6. Perry • PHA 73
Kallio • DET 73
8. Mays • BOS 72
9. Gregg • PHA 69
Ayers • WSH 69

Wild Pitches

Wild Pitches

1. Harper • WSH 13
2. Shaw • WSH 10
3. Johnson • WSH 8
4. Kallio • DET 7
Leonard • BOS 7
6. Jones • BOS 6
Mays • BOS 6
Myers • PHA 6
9. Bush • BOS 5
Dauss • DET 5
Enzmann • CLE 5

Hit By Pitch

Times Hit by a Pitch.

1. Adams • PHA 12
2. Mays • BOS 11
3. Love • NYY 10
4. Dauss • DET 9
5. Jones • BOS 8
Johnson • WSH 8
Mogridge • NYY 8
Harper • WSH 8
9. Ayers • WSH 7
Davenport • SLB 7

Batters Faced

Batters Faced

1. Perry • PHA 1,342
2. Johnson • WSH 1,261
3. Coveleski • CLE 1,254
4. Mays • BOS 1,162
5. Bush • BOS 1,119
6. Bagby • CLE 1,113
7. Cicotte • CHW 1,089
8. Dauss • DET 1,027
9. Harper • WSH 993
10. Shaw • WSH 986

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. Mogridge • NYY 23
2. Houck • SLB 22
3. Danforth • CHW 20
4. Ayers • WSH 15
5. Bagby • CLE 14
6. Enzmann • CLE 13
7. Cunningham • DET 12
8. Johnson • WSH 10
Coumbe • CLE 10
10. Finneran • 2TM 9
Rogers • SLB 9
Adams • PHA 9

Adjusted ERA+

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

1. Johnson • WSH 214
2. Coveleski • CLE 164
3. Perry • PHA 146
4. Sothoron • SLB 139
5. Mogridge • NYY 129
6. Bush • BOS 128
7. Enzmann • CLE 127
8. Harper • WSH 125
9. Mays • BOS 122
10. Ruth • BOS 122

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. Cicotte • CHW 2.02
2. Johnson • WSH 2.03
3. Morton • CLE 2.26
4. Shaw • WSH 2.40
5. Mays • BOS 2.48
6. Bush • BOS 2.49
7. Benz • CHW 2.51
8. Coveleski • CLE 2.53
9. Cunningham • DET 2.60
10. Danforth • CHW 2.61

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. Johnson • WSH 49
2. Coveleski • CLE 35
3. Perry • PHA 32
4. Bush • BOS 16
5. Mays • BOS 16
6. Sothoron • SLB 16
7. Mogridge • NYY 16
8. Harper • WSH 15
9. Faber • CHW 11
10. Ruth • BOS 10

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. Johnson • WSH 6.1
2. Coveleski • CLE 4.2
3. Perry • PHA 3.7
4. Bush • BOS 1.9
5. Mays • BOS 1.9
6. Sothoron • SLB 1.9
7. Mogridge • NYY 1.8
8. Harper • WSH 1.7
9. Faber • CHW 1.3
10. Ruth • BOS 1.2

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. Johnson • WSH 60.05
2. Coveleski • CLE 34.43
3. Perry • PHA 33.24
4. Mays • BOS 23.64
5. Harper • WSH 20.38
6. Mogridge • NYY 20.33
7. Sothoron • SLB 17.69
8. Ruth • BOS 16.86
9. Bush • BOS 16.75
10. Enzmann • CLE 15.85

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. Johnson • WSH 10.2
2. Coveleski • CLE 4.4
3. Harper • WSH 3.1
4. Jones • BOS 3.0
5. Sothoron • SLB 2.6
6. Bagby • CLE 2.3
7. Bush • BOS 2.0
8. Mays • BOS 2.0
9. Cicotte • CHW 2.0
10. Ruth • BOS 1.9

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. Johnson • WSH 6.9
2. Coveleski • CLE 4.4
3. Mays • BOS 3.8
4. Perry • PHA 2.9
5. Boland • DET 2.3
6. Cicotte • CHW 2.3
7. Ruth • BOS 2.2
8. Harper • WSH 2.1
9. Jones • BOS 2.0
10. Sothoron • SLB 1.9

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. Jones • BOS 11.8
2. Johnson • WSH 10.2
3. Ruth • BOS 10.0
4. Coveleski • CLE 9.4
5. Bush • BOS 6.8
6. Mays • BOS 5.3
7. Bagby • CLE 4.5
8. Harper • WSH 4.4
9. Thormahlen • NYY 4.3
10. Morton • CLE 3.9

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. Johnson • WSH 7.7
2. Coveleski • CLE 3.9
3. Perry • PHA 3.8
4. Mays • BOS 2.8
5. Harper • WSH 2.4
6. Mogridge • NYY 2.3
7. Sothoron • SLB 2.1
8. Ruth • BOS 2.0
9. Bush • BOS 2.0
10. Enzmann • CLE 1.8

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