Single Season Losses Leaders

Batters: PA AVG H R 2B 3B HR RBI SB OBP SLG OPS BB
Pitchers: ERA W L W% SH GS CG WHIP HR/9 SV SV%
Rank Player Year Team W L W-L% ERA G GS GF CG SH SV SV% IP BB SO WHIP BR9 HR9
1 Billy Powell 1949 SSL 12 22 .353 4.78 43 38 5 6 0 0 0 246.2 119 120 1.561 14.05 0.99
2 Dazzy Vance 1927 MNL 10 20 .333 3.07 39 34 5 13 3 0 0 272.2 77 175 1.133 10.20 0.40
Lee Meadows 1927 CIR 13 20 .394 3.51 40 40 0 14 0 0 0 297.1 83 77 1.305 11.74 0.54
Warren Spahn 1949 SSL 11 20 .355 3.94 36 36 0 19 3 0 0 285.2 109 155 1.386 12.48 0.66
5 Jesse Haines 1927 IMG 16 19 .457 3.36 49 36 13 14 1 4 67 297.1 92 92 1.291 11.62 0.39
Jack Kralick 1961 BBS 6 19 .240 4.66 31 31 0 7 2 0 0 218.1 57 123 1.392 12.53 1.20
7 Jesse Petty 1927 GTL 16 18 .471 3.02 40 36 4 14 1 0 0 283.1 74 103 1.214 10.93 0.29
Darryl Kile 1997 CIR 11 18 .379 4.32 41 41 0 1 0 0 0 256 148 189 1.457 13.11 1.09
J.r. Richard 1977 BBS 11 18 .379 4.40 34 34 0 11 2 0 0 268 108 207 1.287 11.59 1.21
Jimmy Key 1997 CIR 7 18 .280 4.46 36 36 0 0 0 0 0 212 84 139 1.528 13.75 0.93
Vic Raschi 1949 CIR 13 18 .419 4.79 43 43 0 6 0 0 0 298.2 194 137 1.610 14.49 0.63
Robert McClure 1927 PBP 10 18 .357 4.82 49 35 14 5 1 1 100 240.2 118 53 1.546 13.91 0.30
13 Mel Parnell 1949 BRI 20 17 .541 3.35 40 40 0 18 5 0 0 322.1 134 133 1.350 12.15 0.47
Ellis Kinder 1949 TAF 11 17 .393 3.80 36 33 3 8 3 1 50 241.2 88 149 1.283 11.54 0.97
Ed Lopat 1949 BRI 9 17 .346 4.14 37 36 1 2 0 0 0 230.1 99 68 1.459 13.13 0.63
Yellowhorse Morris 1927 SSL 9 17 .346 4.17 36 33 3 7 0 0 0 215.2 102 62 1.567 14.11 0.46
Madison Bumgarner 2015 GTL 9 17 .346 4.17 30 30 0 4 1 0 0 211.2 45 218 1.294 11.65 1.06
Dave Mcnally 1974 BBC 3 17 .150 4.43 34 34 0 1 0 0 0 189 75 93 1.550 13.95 0.95
Russ Meyer 1949 SSL 7 17 .292 4.94 34 29 5 6 0 1 100 200.1 92 74 1.502 13.52 1.03
Jerry Reuss 1977 BBS 5 17 .227 5.20 32 32 0 0 0 0 0 180 72 112 1.611 14.50 1.00
Rufus Lewis 1949 MNL 10 17 .370 5.82 37 34 3 4 1 1 100 227.1 94 116 1.579 14.21 1.23
22 Burleigh Grimes 1927 SSL 16 16 .500 2.65 46 32 14 5 2 0 0 258 94 115 1.291 11.62 0.42
Lefty Grove 1927 SRR 14 16 .467 2.99 73 26 47 5 2 4 50 274.1 128 184 1.436 12.93 0.20
Nolan Ryan 1977 SRR 16 16 .500 3.26 37 37 0 10 0 0 0 268 206 298 1.474 13.26 0.47
Jeff Fassero 1997 HRH 12 16 .429 3.82 33 33 0 4 2 0 0 224 77 161 1.250 11.25 0.80
Warren Spahn 1961 SUS 9 16 .360 4.07 30 28 2 5 1 0 0 181.1 60 81 1.417 12.76 1.29
Chris Holt 1997 HRH 6 16 .273 4.10 31 31 0 0 0 0 0 184.1 61 89 1.297 11.67 1.03
Lefty Lamarque 1949 GTL 15 16 .484 4.15 41 41 0 12 2 0 0 297.1 80 110 1.339 12.05 0.64
Jack Banta 1949 PVA 9 16 .360 4.29 77 0 77 0 0 22 67 121.2 70 75 1.471 13.24 0.96
Big Bill Foster 1927 SSL 10 16 .385 4.34 34 33 1 8 0 0 0 221.2 133 90 1.674 15.06 0.45
Rube Walberg 1927 GTL 9 16 .360 4.75 38 29 9 5 3 2 50 217.2 99 103 1.475 13.27 0.54
David Wells 1997 TLF 10 16 .385 5.43 34 34 0 1 1 0 0 192.1 52 126 1.466 13.20 1.40
Doyle Alexander 1977 SSL 11 16 .407 5.76 36 36 0 3 0 0 0 211 96 91 1.682 15.14 1.49
34 Frank Lary 1961 SUS 12 15 .444 2.82 30 29 1 9 5 0 0 214 61 107 1.131 10.18 0.46
Gready McKinnis 1949 SSL 11 15 .423 2.83 32 32 0 9 0 0 0 229 75 103 1.162 10.45 0.51
Virgil Trucks 1949 PVA 13 15 .464 3.52 39 37 2 15 0 1 100 289 128 156 1.277 11.49 0.69
Rick Sutcliffe 1987 BCD 11 15 .423 3.52 31 31 0 4 1 0 0 217.1 104 151 1.380 12.42 0.95
Milt Gaston 1927 MIT 8 15 .348 3.74 46 32 14 2 0 0 0 202.1 72 64 1.334 12.01 0.49
Joey Jay 1961 SRR 10 15 .400 3.85 32 31 1 5 2 0 0 196.1 91 126 1.396 12.56 1.15
Dave Goltz 1977 DIN 16 15 .516 3.88 41 41 0 5 0 0 0 294.1 106 183 1.277 11.50 0.76
Hal Newhouser 1949 TAF 14 15 .483 4.13 46 33 13 11 1 5 100 268 104 142 1.340 12.06 0.94
Bob Feller 1949 TAF 9 15 .375 4.21 36 30 6 4 0 0 0 226.2 85 121 1.416 12.75 0.60
Virgil Barnes 1927 TLF 9 15 .375 4.23 32 32 0 0 0 0 0 198 65 59 1.545 13.91 0.32
Ron Guidry 1977 CIR 7 15 .318 4.23 35 29 6 5 0 1 50 204.1 91 179 1.419 12.77 0.97
Denny Neagle 1997 TLF 9 15 .375 4.36 34 34 0 1 1 0 0 223 45 163 1.157 10.41 1.41
Dave Stewart 1987 SRR 7 15 .318 4.42 33 33 0 2 1 0 0 212 103 192 1.401 12.61 0.98
Vern Bickford 1949 BRI 13 15 .464 4.46 38 38 0 3 1 0 0 252.1 115 129 1.403 12.63 0.64
Jim Bibby 1974 SEP 7 15 .318 4.91 32 32 0 3 0 0 0 176 97 91 1.551 13.96 1.28
Rats Henderson 1927 TLF 9 15 .375 4.95 30 26 4 0 0 2 100 171 24 29 1.439 12.95 0.84
Tom Zachary 1927 BRI 5 15 .250 6.92 38 22 16 0 0 1 50 135.1 57 25 1.899 17.09 0.47
51 David Price 2015 PVD 9 14 .391 2.87 32 32 0 1 0 0 0 213 42 214 1.169 10.52 0.46
Jack Quinn 1927 TBK 8 14 .364 2.93 30 26 4 7 2 0 0 193.1 62 48 1.407 12.66 0.37
Jim Palmer 1977 IMG 16 14 .533 3.38 38 38 0 6 0 0 0 288 107 205 1.205 10.84 0.97
Johnny Cueto 2015 BRI 7 14 .333 3.57 33 32 1 2 0 0 0 211.2 54 177 1.252 11.27 1.11
Felix Hernandez 2015 QCK 13 14 .481 3.70 30 30 0 2 0 0 0 199.2 60 198 1.187 10.68 1.13
Don Cardwell 1961 THD 15 14 .517 3.76 36 36 0 4 4 0 0 248.2 95 150 1.307 11.76 1.05
Al Benton 1949 PBP 13 14 .481 3.78 82 0 82 0 0 27 68 104.2 51 31 1.586 14.27 0.60
Tal Strong 1927 CIR 14 14 .500 3.79 36 35 1 5 2 0 0 249.1 93 37 1.336 12.02 0.36
Rick Reuschel 1977 BBS 12 14 .462 3.85 38 38 0 2 0 0 0 243 74 163 1.296 11.67 0.48
Hoyt Wilhelm 1961 THD 8 14 .364 3.88 66 0 66 0 0 21 68 109 51 74 1.440 12.96 0.83
Eppa Rixey 1927 TBK 9 14 .391 3.99 39 28 11 5 0 0 0 201 48 41 1.493 13.43 0.40
Paul Splittorff 1974 SEP 10 14 .417 4.06 32 32 0 1 0 0 0 193 59 75 1.373 12.36 0.98
Jay Heard 1949 CIR 16 14 .533 4.07 44 44 0 3 0 0 0 307.2 110 138 1.297 11.67 0.82
Jim Bibby 1977 MNL 10 14 .417 4.10 34 33 1 0 0 0 0 204 99 145 1.510 13.59 0.88
Tyson Ross 2015 PFW 12 14 .462 4.12 31 31 0 0 0 0 0 185.2 77 201 1.212 10.91 0.87
Jim Bunning 1961 BBS 12 14 .462 4.12 32 32 0 9 3 0 0 233.2 70 143 1.262 11.36 1.54
Don Newcombe 1949 MNL 15 14 .517 4.16 37 34 3 11 1 0 0 255.1 96 155 1.449 13.04 0.81
John Lackey 2015 PFW 12 14 .462 4.18 33 33 0 2 0 0 0 217.1 64 145 1.238 11.14 1.08
Scott Kazmir 2015 MNL 6 14 .300 4.34 30 30 0 0 0 0 0 178.1 70 138 1.335 12.01 0.96
Rudy May 1977 TLF 9 14 .391 4.36 32 32 0 0 0 0 0 198.1 67 96 1.286 11.57 0.91
Groundhog Thompson 1949 BRI 13 14 .481 4.47 34 33 1 3 0 0 0 221.2 58 69 1.389 12.51 0.65
Noah Syndergaard 2015 MNL 5 14 .263 4.52 23 23 0 0 0 0 0 147.1 39 148 1.229 11.06 1.53
Vida Blue 1977 SSL 9 14 .391 4.61 35 35 0 4 1 0 0 230.1 76 139 1.363 12.27 1.56
Pat Hentgen 1997 CIR 9 14 .391 4.68 41 41 0 1 1 0 0 244 76 157 1.357 12.21 1.44
Jerry Augustine 1977 GTL 8 14 .364 4.81 28 28 0 0 0 0 0 181.1 48 64 1.395 12.56 0.94
Alex Fernandez 1997 TLF 7 14 .333 4.83 34 34 0 0 0 0 0 207 88 172 1.473 13.26 1.78
Jon Lester 2015 GTL 5 14 .263 4.86 26 26 0 1 0 0 0 174 41 181 1.328 11.95 1.14
Garrett Richards 2015 MNL 11 14 .440 5.07 32 32 0 0 0 0 0 198.2 80 152 1.379 12.41 1.49
Sam Streeter 1927 MWB 16 14 .533 5.11 38 38 0 15 1 0 0 288.2 84 103 1.510 13.59 0.62
Esteban Loaiza 1997 GTL 10 14 .417 5.46 31 31 0 2 1 0 0 191.1 63 106 1.443 12.98 1.46
Johnny Sain 1949 DIN 8 14 .364 5.74 33 33 0 1 1 0 0 169.1 59 52 1.654 14.88 0.85
Mark Lemongello 1977 COL 7 14 .333 5.78 37 37 0 0 0 0 0 176 78 91 1.790 16.11 0.82
Andy Ashby 1997 QCK 5 14 .263 6.18 33 33 0 0 0 0 0 185 61 132 1.551 13.96 1.17
Mike Torrez 1977 CIR 8 14 .364 8.13 31 31 0 1 0 0 0 166 78 92 1.928 17.35 1.84
85 Jake Arrieta 2015 BRI 14 13 .519 2.43 31 31 0 5 3 0 0 229.1 59 224 0.977 8.79 0.63
Dennis Leonard 1977 MIT 17 13 .567 2.83 59 27 32 6 0 6 60 260.2 87 221 1.162 10.46 0.79
Clifford Carter 1927 MIT 13 13 .500 2.88 36 35 1 2 1 0 0 212.2 69 46 1.227 11.05 0.63
Charlie Root 1927 GTL 19 13 .594 2.99 40 39 1 19 3 0 0 322.1 131 146 1.198 10.78 0.53
Waite Hoyt 1927 BRI 15 13 .536 3.08 34 34 0 13 2 0 0 257 55 112 1.183 10.65 0.53
Matt Harvey 2015 CIR 10 13 .435 3.43 29 29 0 0 0 0 0 189 57 171 1.212 10.90 1.05
Whitey Ford 1961 SUS 9 13 .409 3.44 29 29 0 4 0 0 0 183.1 67 129 1.151 10.36 0.69
Ted Lyons 1927 BUM 23 13 .639 3.46 84 14 70 5 1 4 50 312 77 80 1.333 12.00 0.35
Verdell Mathis 1949 QCK 9 13 .409 3.58 54 18 36 6 0 3 75 208.2 131 65 1.476 13.28 0.56
Ed Figueroa 1977 BUM 14 13 .519 3.59 38 38 0 2 0 0 0 238 81 97 1.324 11.91 0.72
Larry Dierker 1974 CIR 9 13 .409 3.86 26 25 1 4 0 0 0 170.1 84 116 1.321 11.89 1.00
Don Gullett 1974 GTL 7 13 .350 3.89 26 26 0 8 3 0 0 196.2 67 149 1.246 11.21 1.10
Howie Pollet 1949 MNL 12 13 .480 3.89 40 31 9 6 1 0 0 249.2 77 135 1.374 12.36 0.68
Tom Seaver 1974 LVS 11 13 .458 3.94 27 27 0 4 1 0 0 185 60 160 1.319 11.87 1.07
Ken Heintzelman 1949 SPS 16 13 .552 3.97 46 39 7 3 2 0 0 244.2 104 81 1.377 12.40 0.74
Luther Farrell 1927 BUM 17 13 .567 3.98 43 43 0 9 1 0 0 283 77 72 1.360 12.24 0.51