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. Trout • LAA 10.4
2. Betts • BOS 9.8
3. Altuve • HOU 7.8
4. Machado • BAL 7.4
5. Verlander • DET 7.4
6. Canó • SEA 7.3
7. Donaldson • TOR 7.3
8. Correa • HOU 7.0
9. Beltré • TEX 6.9
10. Seager • SEA 6.8

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. Verlander • DET 7.4
2. Kluber • CLE 5.6
3. Fulmer • DET 5.4
4. Quintana • CHW 5.3
5. Hamels • TEX 5.2
Tanaka • NYY 5.2
7. Sanchez • TOR 5.1
8. Sale • CHW 5.0
9. Porcello • BOS 4.7
10. Happ • TOR 4.5

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. Sanchez • TOR 3.00
2. Verlander • DET 3.04
3. Tanaka • NYY 3.07
4. Kluber • CLE 3.14
5. Porcello • BOS 3.15
6. Happ • TOR 3.18
7. Quintana • CHW 3.20
8. Hamels • TEX 3.32
9. Sale • CHW 3.34
10. Santana • MIN 3.38

Wins

Wins

1. Porcello • BOS 22
2. Happ • TOR 20
3. Kluber • CLE 18
4. Price • BOS 17
Sale • CHW 17
6. Iwakuma • SEA 16
Tillman • BAL 16
Verlander • DET 16
9. Hamels • TEX 15
Sanchez • TOR 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. Sanchez • TOR .882
2. Porcello • BOS .846
3. Happ • TOR .833
4. Tanaka • NYY .778
5. Hamels • TEX .750
6. Tillman • BAL .727
7. Wright • BOS .684
8. Kluber • CLE .667
9. Price • BOS .654
10. Salazar • CLE .647

Walks & Hits per IP

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

1. Verlander • DET 1.001
2. Porcello • BOS 1.009
3. Sale • CHW 1.037
4. Kluber • CLE 1.056
5. Tanaka • NYY 1.077
6. Estrada • TOR 1.119
7. Duffy • KCR 1.141
8. Quintana • CHW 1.163
9. Sanchez • TOR 1.167
10. Happ • TOR 1.169

Hits per 9 IP

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

1. Estrada • TOR 6.750
2. Verlander • DET 6.760
3. Kluber • CLE 7.116
4. Sale • CHW 7.544
5. Sanchez • TOR 7.547
6. Happ • TOR 7.754
7. Porcello • BOS 7.789
8. Kennedy • KCR 7.957
9. Tanaka • NYY 8.068
10. Tillman • BAL 8.110

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. Tomlin • CLE 1.034
2. Porcello • BOS 1.291
3. Tanaka • NYY 1.623
4. Sale • CHW 1.787
5. Price • BOS 1.957
6. Nolasco • 2TM 2.003
7. Iwakuma • SEA 2.080
8. Duffy • KCR 2.104
9. Quintana • CHW 2.163
10. Fiers • HOU 2.241

Strikeouts per 9 IP

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

1. Pineda • NYY 10.605
2. Archer • TBR 10.416
3. Verlander • DET 10.041
4. Kluber • CLE 9.502
5. Duffy • KCR 9.417
6. Sale • CHW 9.251
7. Rodón • CHW 9.164
8. Hamels • TEX 8.970
9. Price • BOS 8.922
10. Gausman • BAL 8.716

Games Played

Games Played or Pitched

1. Shaw • CLE 75
2. Betances • NYY 73
Dyson • TEX 73
4. Herrera • KCR 72
Osuna • TOR 72
Pressly • MIN 72
7. Brach • BAL 71
Jones • CHW 71
9. Dull • OAK 70
Soria • KCR 70
Miller • 2TM 70

Saves

Saves

1. Britton • BAL 47
2. Rodríguez • DET 44
3. Dyson • TEX 38
4. Robertson • CHW 37
Colomé • TBR 37
6. Osuna • TOR 36
7. Allen • CLE 32
8. Kimbrel • BOS 31
9. Madson • OAK 30
10. Davis • KCR 27

Innings Pitched

Innings Pitched

1. Price • BOS 230.0
2. Verlander • DET 227.2
3. Sale • CHW 226.2
4. Porcello • BOS 223.0
5. Kluber • CLE 215.0
6. Quintana • CHW 208.0
7. Stroman • TOR 204.0
8. Archer • TBR 201.1
9. Hamels • TEX 200.2
10. Tanaka • NYY 199.2

Strikeouts

Strikeouts

1. Verlander • DET 254
2. Archer • TBR 233
Sale • CHW 233
4. Price • BOS 228
5. Kluber • CLE 227
6. Pineda • NYY 207
7. Hamels • TEX 200
8. Porcello • BOS 189
9. Duffy • KCR 188
10. Kennedy • KCR 184

Games Started

Games Started

1. Price • BOS 35
2. Verlander • DET 34
Vólquez • KCR 34
4. Archer • TBR 33
Iwakuma • SEA 33
Kennedy • KCR 33
McHugh • HOU 33
Odorizzi • TBR 33
Pérez • TEX 33
Porcello • BOS 33
Santiago • 2TM 33

Complete Games

Complete Game

1. Sale • CHW 6
2. Wright • BOS 4
3. Kluber • CLE 3
Porcello • BOS 3
5. Verlander • DET 2
Graveman • OAK 2
Ventura • KCR 2
Santana • MIN 2
Price • BOS 2
10. Bauer • CLE 1
Carrasco • CLE 1
Chacín • LAA 1
Duffy • KCR 1
Fulmer • DET 1
Gibson • MIN 1
Hughes • MIN 1
Jiménez • BAL 1
Keuchel • HOU 1
Lewis • TEX 1
Andriese • TBR 1
Shields • CHW 1
Shoemaker • LAA 1
Walker • SEA 1
Weaver • LAA 1
Miley • 2TM 1
Nolasco • 2TM 1
McHugh • HOU 1

Shutouts

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

1. Kluber • CLE 2
2. Andriese • TBR 1
Carrasco • CLE 1
Fulmer • DET 1
Graveman • OAK 1
Keuchel • HOU 1
Sale • CHW 1
Santana • MIN 1
Shoemaker • LAA 1
Walker • SEA 1
Weaver • LAA 1
Wright • BOS 1
Miley • 2TM 1
Nolasco • 2TM 1

Home Runs

Home Runs Hit/Allowed

1. Weaver • LAA 37
2. Tomlin • CLE 36
3. Kennedy • KCR 33
Santiago • 2TM 33
5. Smyly • TBR 32
6. Shields • CHW 31
7. Archer • TBR 30
Price • BOS 30
Sánchez • DET 30
Verlander • DET 30

Bases on Balls

Bases on Balls/Walks

1. Santiago • 2TM 79
2. Ventura • KCR 78
3. Hamels • TEX 77
4. Pérez • TEX 76
Vólquez • KCR 76
6. Jiménez • BAL 72
7. Bauer • CLE 70
8. Archer • TBR 67
9. Kennedy • KCR 66
Tillman • BAL 66

Hits

Hits/Hits Allowed

1. Price • BOS 227
2. Iwakuma • SEA 218
3. Vólquez • KCR 217
4. Stroman • TOR 209
Weaver • LAA 209
6. McHugh • HOU 206
7. Pérez • TEX 205
8. Nolasco • 2TM 202
9. Graveman • OAK 196
10. Fister • HOU 195

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. Porcello • BOS 5.906
2. Tomlin • CLE 5.900
3. Sale • CHW 5.178
4. Tanaka • NYY 4.583
5. Price • BOS 4.560
6. Duffy • KCR 4.476
7. Verlander • DET 4.456
8. Kluber • CLE 3.982
9. Pineda • NYY 3.906
10. Gausman • BAL 3.702

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. Sanchez • TOR 0.703
2. Pérez • TEX 0.815
3. Kluber • CLE 0.921
4. Stroman • TOR 0.926
5. Porcello • BOS 0.928
6. Santana • MIN 0.943
7. Bauer • CLE 0.947
8. Quintana • CHW 0.952
9. Tanaka • NYY 0.992
10. Tillman • BAL 0.994

Losses

Losses

1. Archer • TBR 19
2. Dickey • TOR 15
3. Nolasco • 2TM 14
4. Fister • HOU 13
Sánchez • DET 13
Shoemaker • LAA 13
Miley • 2TM 13
8. Duffey • MIN 12
Gausman • BAL 12
Iwakuma • SEA 12
Jiménez • BAL 12
Keuchel • HOU 12
Pineda • NYY 12
Quintana • CHW 12
Sabathia • NYY 12
Shields • CHW 12
Smyly • TBR 12
Ventura • KCR 12
Weaver • LAA 12

Earned Runs

Earned Runs Allowed

1. Vólquez • KCR 113
2. Price • BOS 102
3. Sánchez • DET 100
Weaver • LAA 100
5. Stroman • TOR 99
Miley • 2TM 99
7. Pérez • TEX 97
Nolasco • 2TM 97
9. Duffey • MIN 95
Smyly • TBR 95
Santiago • 2TM 95

Wild Pitches

Wild Pitches

1. Fiers • HOU 17
2. Gray • OAK 15
3. Giles • HOU 14
4. Ventura • KCR 13
5. Archer • TBR 11
Rodón • CHW 11
Santana • MIN 11
8. Britton • BAL 10
Fister • HOU 10
May • MIN 10
Quintana • CHW 10
Smyly • TBR 10
Wright • BOS 10

Hit By Pitch

Times Hit by a Pitch.

1. Sale • CHW 17
2. Kennedy • KCR 13
Porcello • BOS 13
4. Hernández • SEA 10
5. Bauer • CLE 9
Fulmer • DET 9
Sabathia • NYY 9
Wright • BAL 9
9. Hamels • TEX 8
Hill • OAK 8
Ross • BOS 8
Ventura • KCR 8
Verlander • DET 8
Walker • SEA 8
Wright • BOS 8

Batters Faced

Batters Faced

1. Price • BOS 951
2. Sale • CHW 907
3. Verlander • DET 903
4. Porcello • BOS 890
5. Kluber • CLE 860
6. Pérez • TEX 855
Stroman • TOR 855
8. Vólquez • KCR 853
9. Archer • TBR 850
10. Hamels • TEX 848

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. Britton • BAL 63
2. Osuna • TOR 61
3. Allen • CLE 55
Rodríguez • DET 55
5. Dyson • TEX 53
Madson • OAK 53
7. Colomé • TBR 48
Robertson • CHW 48
9. Kimbrel • BOS 47
10. Cishek • SEA 40
Davis • KCR 40

Adjusted ERA+

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

1. Kluber • CLE 144
2. Sanchez • TOR 142
3. Porcello • BOS 142
4. Tanaka • NYY 140
5. Verlander • DET 140
6. Hamels • TEX 137
7. Happ • TOR 134
8. Quintana • CHW 126
9. Santana • MIN 125
10. Duffy • KCR 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. Kluber • CLE 3.26
2. Porcello • BOS 3.40
3. Sale • CHW 3.46
4. Verlander • DET 3.48
5. Tanaka • NYY 3.51
6. Sanchez • TOR 3.55
7. Quintana • CHW 3.56
8. Price • BOS 3.60
9. Stroman • TOR 3.71
10. Pineda • NYY 3.79

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. Verlander • DET 31
2. Porcello • BOS 30
3. Kluber • CLE 30
4. Sanchez • TOR 26
5. Britton • BAL 26
6. Tanaka • NYY 26
7. Happ • TOR 24
8. Hamels • TEX 24
9. Devenski • HOU 24
10. Miller • 2TM 23

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. Verlander • DET 3.3
2. Porcello • BOS 3.2
3. Kluber • CLE 3.2
4. Sanchez • TOR 2.8
5. Tanaka • NYY 2.7
6. Britton • BAL 2.7
7. Happ • TOR 2.5
8. Hamels • TEX 2.5
9. Devenski • HOU 2.5
10. Miller • 2TM 2.4

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. Verlander • DET 37.26
2. Kluber • CLE 31.95
3. Sanchez • TOR 31.55
4. Britton • BAL 31.31
5. Devenski • HOU 30.16
6. Tanaka • NYY 29.84
7. Porcello • BOS 28.42
8. Happ • TOR 28.37
9. Quintana • CHW 27.81
10. Otero • CLE 26.16

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. Britton • BAL 6.4
2. Miller • 2TM 5.2
3. Verlander • DET 3.9
4. Dyson • TEX 3.7
5. Sanchez • TOR 3.3
6. Tanaka • NYY 3.1
7. Osuna • TOR 3.1
8. Quintana • CHW 2.7
9. Allen • CLE 2.6
10. Happ • TOR 2.6

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. Kluber • CLE 3.7
2. Porcello • BOS 3.2
3. Devenski • HOU 3.0
4. Tanaka • NYY 3.0
5. Sale • CHW 2.8
6. Miller • 2TM 2.7
7. Britton • BAL 2.6
8. Quintana • CHW 2.5
9. Verlander • DET 2.4
10. Sanchez • TOR 2.4

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. Britton • BAL 6.7
2. Osuna • TOR 3.7
3. Porcello • BOS 2.6
4. Dyson • TEX 2.6
5. Verlander • DET 2.5
6. Miller • 2TM 2.5
7. Happ • TOR 2.4
8. Givens • BAL 2.0
9. Kluber • CLE 2.0
10. Sanchez • TOR 1.8

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. Verlander • DET 3.9
2. Sanchez • TOR 3.3
3. Kluber • CLE 3.3
4. Devenski • HOU 3.2
5. Britton • BAL 3.2
6. Tanaka • NYY 3.1
7. Quintana • CHW 3.0
8. Happ • TOR 3.0
9. Porcello • BOS 2.9
10. Sale • CHW 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