Between the 1977 and 1987 seasons, Mark Langston won the most games for the Mariners in a season, with 19 wins in 1987.
| NAME | W | SEASON | TM | L | W% | G | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | M. Langston | 19 | 1987 | 13 | .594 | 35 | 35 | 3.84 | 262 | 14 | 3 | 0 | 272.0 | 242 | 116 | 132 | 30 | 114 | 5 | 0 | 0 | 1,152 | 9 | 8.67 | 3.77 | 2.30 | 0.99 | 22.7 | 9.9 | 1.31 | .286 | 4.37 | 84 | 3.68 | 79 | 8.01 | 29.5 | |
| 2 | | M. Moore | 17 | 1985 | 10 | .630 | 35 | 34 | 3.46 | 155 | 14 | 2 | 0 | 247.0 | 230 | 95 | 100 | 18 | 70 | 4 | 1 | 2 | 1,016 | 10 | 5.65 | 2.55 | 2.21 | 0.66 | 15.3 | 6.9 | 1.21 | .276 | 3.64 | 83 | 3.27 | 77 | 8.38 | 26.4 | |
| 3 | | M. Langston | 17 | 1984 | 10 | .630 | 35 | 33 | 3.40 | 204 | 5 | 2 | 0 | 225.0 | 188 | 85 | 99 | 16 | 118 | 8 | 0 | 5 | 965 | 4 | 8.16 | 4.72 | 1.73 | 0.64 | 21.1 | 12.2 | 1.36 | .278 | 3.96 | 84 | 3.55 | 85 | 7.52 | 15.4 | |
| 4 | | M. Parrott | 14 | 1979 | 12 | .538 | 38 | 30 | 3.77 | 127 | 13 | 2 | 0 | 229.1 | 231 | 96 | 104 | 17 | 86 | 6 | 4 | 16 | 973 | 1 | 4.98 | 3.38 | 1.48 | 0.67 | 13.1 | 8.8 | 1.38 | .290 | 4.08 | 88 | 3.78 | 85 | 9.07 | 16.5 | |
| 5 | | M. Morgan | 12 | 1987 | 17 | .414 | 34 | 31 | 4.65 | 85 | 8 | 2 | 0 | 207.0 | 245 | 107 | 117 | 25 | 53 | 5 | 2 | 3 | 898 | 11 | 3.70 | 2.30 | 1.60 | 1.09 | 9.5 | 5.9 | 1.44 | .301 | 5.09 | 101 | 4.45 | 95 | 10.65 | 5.6 | |
| 6 | | M. Langston | 12 | 1986 | 14 | .462 | 37 | 36 | 4.85 | 245 | 9 | 0 | 0 | 239.1 | 234 | 129 | 142 | 30 | 123 | 4 | 1 | 1 | 1,057 | 10 | 9.21 | 4.63 | 1.99 | 1.13 | 23.2 | 11.6 | 1.49 | .311 | 5.34 | 113 | 3.93 | 90 | 8.80 | 11.4 | |
| 7 | | M. Young | 12 | 1985 | 19 | .387 | 37 | 35 | 4.91 | 136 | 5 | 2 | 1 | 218.1 | 242 | 119 | 135 | 23 | 76 | 7 | 2 | 3 | 951 | 6 | 5.61 | 3.13 | 1.79 | 0.95 | 14.3 | 8.0 | 1.46 | .309 | 5.56 | 117 | 3.94 | 93 | 9.98 | 7.6 | |
| 8 | | J. Beattie | 12 | 1984 | 16 | .429 | 32 | 32 | 3.41 | 119 | 12 | 2 | 0 | 211.0 | 206 | 80 | 86 | 13 | 75 | 5 | 0 | 6 | 882 | 6 | 5.08 | 3.20 | 1.59 | 0.55 | 13.5 | 8.5 | 1.33 | .288 | 3.67 | 84 | 3.57 | 86 | 8.79 | 14 | |
| 9 | | F. Bannister | 12 | 1982 | 13 | .480 | 35 | 35 | 3.43 | 209 | 5 | 3 | 0 | 247.0 | 225 | 94 | 112 | 32 | 77 | 3 | 0 | 0 | 1,022 | 6 | 7.62 | 2.81 | 2.71 | 1.17 | 20.5 | 7.5 | 1.22 | .275 | 4.08 | 82 | 3.67 | 85 | 8.20 | 17.2 | |
| 10 | | B. Caudill | 12 | 1982 | 9 | .571 | 70 | 0 | 2.35 | 111 | 0 | 0 | 26 | 95.2 | 65 | 25 | 25 | 9 | 35 | 1 | 64 | 4 | 380 | 2 | 10.44 | 3.29 | 3.17 | 0.85 | 29.2 | 9.2 | 1.05 | .250 | 2.35 | 56 | 2.74 | 64 | 6.11 | 16.1 | |
| 11 | | G. Abbott | 12 | 1980 | 12 | .500 | 31 | 31 | 4.10 | 78 | 7 | 2 | 0 | 215.0 | 228 | 98 | 110 | 27 | 49 | 3 | 0 | 4 | 903 | 1 | 3.27 | 2.05 | 1.59 | 1.13 | 8.6 | 5.4 | 1.29 | .269 | 4.60 | 98 | 4.38 | 102 | 9.54 | -0.8 | |
| 12 | | G. Abbott | 12 | 1977 | 13 | .480 | 36 | 34 | 4.45 | 100 | 7 | 0 | 0 | 204.1 | 212 | 101 | 111 | 32 | 56 | 12 | 0 | 2 | 864 | 3 | 4.40 | 2.47 | 1.79 | 1.41 | 11.6 | 6.5 | 1.31 | .271 | 4.89 | 107 | 4.78 | 111 | 9.34 | -9.7 | |
| 13 | | L. Guetterman | 11 | 1987 | 4 | .733 | 25 | 17 | 3.81 | 42 | 2 | 1 | 0 | 113.1 | 117 | 48 | 60 | 13 | 35 | 2 | 3 | 2 | 483 | 3 | 3.34 | 2.78 | 1.20 | 1.03 | 8.7 | 7.2 | 1.34 | .266 | 4.76 | 83 | 4.59 | 98 | 9.29 | 1.4 | |
| 14 | | M. Moore | 11 | 1986 | 13 | .458 | 38 | 37 | 4.30 | 146 | 11 | 1 | 1 | 266.0 | 279 | 127 | 141 | 28 | 94 | 12 | 1 | 6 | 1,145 | 4 | 4.94 | 3.18 | 1.55 | 0.95 | 12.8 | 8.2 | 1.40 | .290 | 4.77 | 100 | 4.23 | 97 | 9.44 | 4.5 | |
| 15 | | M. Morgan | 11 | 1986 | 17 | .393 | 37 | 33 | 4.53 | 116 | 9 | 1 | 1 | 216.1 | 243 | 109 | 122 | 24 | 86 | 4 | 2 | 3 | 951 | 8 | 4.83 | 3.58 | 1.35 | 1.00 | 12.2 | 9.0 | 1.52 | .304 | 5.08 | 105 | 4.38 | 100 | 10.11 | 0.2 | |
| 16 | | M. Young | 11 | 1983 | 15 | .423 | 33 | 32 | 3.27 | 130 | 5 | 2 | 0 | 203.2 | 178 | 74 | 86 | 17 | 79 | 7 | 0 | 2 | 851 | 4 | 5.74 | 3.49 | 1.65 | 0.75 | 15.3 | 9.3 | 1.26 | .261 | 3.80 | 80 | 3.82 | 92 | 7.87 | 7.7 | |
| 17 | | R. Honeycutt | 11 | 1979 | 12 | .478 | 33 | 28 | 4.04 | 83 | 8 | 1 | 0 | 194.0 | 201 | 87 | 103 | 22 | 67 | 6 | 2 | 7 | 839 | 5 | 3.85 | 3.11 | 1.24 | 1.02 | 9.9 | 8.0 | 1.38 | .271 | 4.78 | 94 | 4.47 | 101 | 9.32 | 0 | |
| 18 | | E. Romo | 11 | 1978 | 7 | .611 | 56 | 0 | 3.69 | 62 | 0 | 0 | 10 | 107.1 | 88 | 44 | 46 | 12 | 39 | 5 | 42 | 6 | 445 | 4 | 5.20 | 3.27 | 1.59 | 1.01 | 13.9 | 8.8 | 1.18 | .232 | 3.86 | 96 | 4.10 | 102 | 7.38 | -0.5 | |
| 19 | | J. Beattie | 10 | 1983 | 15 | .400 | 30 | 29 | 3.84 | 132 | 8 | 2 | 0 | 196.2 | 197 | 84 | 89 | 12 | 66 | 3 | 0 | 6 | 834 | 6 | 6.04 | 3.02 | 2.00 | 0.55 | 15.8 | 7.9 | 1.34 | .298 | 4.07 | 94 | 3.25 | 78 | 9.02 | 19.5 | |
| 20 | | G. Perry | 10 | 1982 | 12 | .455 | 32 | 32 | 4.40 | 116 | 6 | 0 | 0 | 216.2 | 245 | 106 | 117 | 27 | 54 | 4 | 0 | 4 | 923 | 13 | 4.82 | 2.24 | 2.15 | 1.12 | 12.6 | 5.9 | 1.38 | .302 | 4.86 | 105 | 4.06 | 94 | 10.18 | 6.2 | |
| 21 | | R. Honeycutt | 10 | 1980 | 17 | .370 | 30 | 30 | 3.94 | 79 | 9 | 1 | 0 | 203.1 | 221 | 89 | 99 | 22 | 60 | 3 | 0 | 7 | 871 | 4 | 3.50 | 2.66 | 1.32 | 0.97 | 9.1 | 6.9 | 1.38 | .281 | 4.38 | 94 | 4.30 | 100 | 9.78 | 0.8 | |
| 22 | | F. Bannister | 10 | 1979 | 15 | .400 | 30 | 30 | 4.05 | 115 | 6 | 2 | 0 | 182.1 | 185 | 82 | 92 | 25 | 68 | 4 | 0 | 4 | 792 | 1 | 5.68 | 3.36 | 1.69 | 1.23 | 14.5 | 8.6 | 1.39 | .276 | 4.54 | 94 | 4.43 | 100 | 9.13 | 0.8 | |
| 23 | | S. Bankhead | 9 | 1987 | 8 | .529 | 27 | 25 | 5.42 | 95 | 2 | 0 | 0 | 149.1 | 168 | 90 | 96 | 35 | 37 | 3 | 1 | 0 | 642 | 2 | 5.73 | 2.23 | 2.57 | 2.11 | 14.8 | 5.8 | 1.37 | .282 | 5.79 | 118 | 5.44 | 116 | 10.13 | -11.6 | |
| 24 | | M. Moore | 9 | 1987 | 19 | .321 | 33 | 33 | 4.71 | 115 | 12 | 0 | 0 | 231.0 | 268 | 121 | 145 | 29 | 84 | 0 | 0 | 3 | 1,020 | 4 | 4.48 | 3.27 | 1.37 | 1.13 | 11.3 | 8.2 | 1.52 | .302 | 5.65 | 103 | 4.59 | 98 | 10.44 | 2.9 | |
| 25 | | B. Stoddard | 9 | 1983 | 17 | .346 | 35 | 23 | 4.41 | 87 | 2 | 1 | 0 | 175.2 | 182 | 86 | 95 | 29 | 58 | 4 | 4 | 0 | 739 | 5 | 4.46 | 2.97 | 1.50 | 1.49 | 11.8 | 7.8 | 1.37 | .273 | 4.87 | 107 | 4.96 | 119 | 9.32 | -14.7 | |
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
88 | 62 | .587 | ||
83 | 67 | .553 | 5.0 | |
74 | 76 | .493 | 14.0 | |
70 | 81 | .464 | 18.5 | |
69 | 80 | .463 | 18.5 | |
| NL Central | W | L | PCT | GB |
 Brewers - x | 93 | 57 | .620 | |
83 | 67 | .553 | 10.0 | |
75 | 75 | .500 | 18.0 | |
74 | 76 | .493 | 19.0 | |
70 | 79 | .470 | 22.5 | |
| NL West | W | L | PCT | GB |
90 | 59 | .604 | ||
81 | 68 | .544 | 9.0 | |
79 | 71 | .527 | 11.5 | |
62 | 88 | .413 | 28.5 | |
55 | 94 | .369 | 35.0 |
Braves
Phillies
Marlins
Nationals
Mets
Cubs
Pirates
Cardinals
Reds
Dodgers
Padres
Diamondbacks
Giants| AL East | W | L | PCT | GB |
|---|---|---|---|---|
 Rays - x | 90 | 59 | .604 | |
86 | 63 | .577 | 4.0 | |
82 | 68 | .547 | 8.5 | |
75 | 75 | .500 | 15.5 | |
72 | 78 | .480 | 18.5 | |
| AL Central | W | L | PCT | GB |
76 | 73 | .510 | ||
76 | 74 | .507 | 0.5 | |
70 | 79 | .470 | 6.0 | |
70 | 79 | .470 | 6.0 | |
66 | 84 | .440 | 10.5 | |
| AL West | W | L | PCT | GB |
75 | 75 | .500 | ||
74 | 76 | .493 | 1.0 | |
70 | 80 | .467 | 5.0 | |
61 | 89 | .407 | 14.0 | |
56 | 93 | .376 | 18.5 |
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Blue Jays
Orioles
White Sox
Guardians
Twins
Tigers
Royals