| Seattle Mariners - 2021 | |||||||||
Record: 90-72 Park: T-Mobile Park Attendance: 1,215,985 Park Factor: 95 |
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| Batting | Pitching | Fielding | Lineups | Value | |||||||
| Player | G | BFP | OUTS | ER | ERA | ERpm | eWL |
| Drew Steckenrider | 62 | 267 | 203 | 15 | 2.00 | 16.9 | 7-1 |
| Casey Sadler | 42 | 145 | 121 | 3 | 0.67 | 16.3 | 4-0 |
| Kendall Graveman | 30 | 121 | 99 | 3 | 0.82 | 12.8 | 4-0 |
| Chris Flexen | 31 | 741 | 539 | 72 | 3.61 | 11.4 | 11-9 |
| Paul Sewald | 62 | 264 | 194 | 22 | 3.06 | 8.2 | 5-2 |
| Joe Smith | 23 | 70 | 54 | 4 | 2.00 | 4.5 | 2-0 |
| J. T. Chargois | 31 | 118 | 90 | 10 | 3.00 | 4.0 | 2-1 |
| Erik Swanson | 33 | 144 | 106 | 13 | 3.31 | 3.5 | 2-2 |
| Marco Gonzales | 25 | 585 | 430 | 63 | 3.96 | 3.3 | 8-8 |
| Diego Castillo | 24 | 88 | 66 | 7 | 2.86 | 3.3 | 1-1 |
| Hector Santiago | 13 | 117 | 79 | 10 | 3.42 | 2.3 | 2-1 |
| Justin Dunn | 11 | 218 | 151 | 21 | 3.75 | 2.3 | 3-3 |
| Matt Andriese | 8 | 45 | 33 | 3 | 2.45 | 2.2 | 1-0 |
| Domingo Tapia | 2 | 11 | 6 | 0 | 0.00 | 1.0 | 0-0 |
| Yohan Ramirez | 25 | 114 | 83 | 12 | 3.90 | 0.8 | 2-1 |
| Andres Munoz | 1 | 4 | 2 | 0 | 0.00 | 0.3 | 0-0 |
| Jack Mayfield | 1 | 1 | 1 | 0 | 0.00 | 0.2 | 0-0 |
| James Paxton | 1 | 5 | 4 | 1 | 6.75 | -0.4 | 0-0 |
| Ryan Weber | 2 | 12 | 9 | 2 | 6.00 | -0.6 | 0-0 |
| Sean Doolittle | 11 | 50 | 34 | 6 | 4.76 | -0.8 | 0-1 |
| Daniel Zamora | 4 | 18 | 13 | 3 | 6.23 | -1.0 | 0-0 |
| Vinny Nittoli | 1 | 6 | 3 | 2 | 18.00 | -1.6 | 0-0 |
| Yacksel Rios | 3 | 16 | 9 | 3 | 9.00 | -1.7 | 0-0 |
| Brady Lail | 2 | 10 | 6 | 3 | 13.50 | -2.2 | 0-0 |
| Keynan Middleton | 32 | 140 | 93 | 17 | 4.94 | -2.8 | 1-2 |
| Anthony Misiewicz | 66 | 236 | 164 | 28 | 4.61 | -2.9 | 3-3 |
| Aaron Fletcher | 4 | 20 | 11 | 5 | 12.27 | -3.4 | 0-0 |
| Darren McCaughan | 2 | 39 | 27 | 8 | 8.00 | -4.0 | 0-1 |
| Yusei Kikuchi | 29 | 666 | 471 | 77 | 4.41 | -4.7 | 8-9 |
| Tyler Anderson | 13 | 273 | 191 | 34 | 4.81 | -4.8 | 3-4 |
| Nick Margevicius | 5 | 60 | 36 | 11 | 8.25 | -5.7 | 0-1 |
| Ljay Newsome | 7 | 69 | 44 | 13 | 7.98 | -6.5 | 0-2 |
| Logan Gilbert | 24 | 503 | 358 | 62 | 4.68 | -7.2 | 6-7 |
| Will Vest | 32 | 156 | 105 | 24 | 6.17 | -8.2 | 1-3 |
| Wyatt Mills | 11 | 64 | 38 | 14 | 9.95 | -8.5 | 0-1 |
| Robert Dugger | 12 | 121 | 77 | 21 | 7.36 | -9.5 | 1-2 |
| Rafael Montero | 40 | 204 | 130 | 35 | 7.27 | -15.6 | 1-4 |
| Justus Sheffield | 21 | 385 | 241 | 61 | 6.83 | -24.9 | 2-7 |