Team fielding -- 2021 Seattle Mariners
Regular season -- as of 9/28/2021
| Primary |
| Pos |  | Name | G | GS | INN | PO | A | E | DP | TC | PCT | PB | SB | CS | SB% | PK |
| p | | Mike Leake | 25 | 25 | 153.7 | 13 | 18 | 1 | 4 | 32 | .969 | | 11 | 6 | .647 | 0 |
| | | Jake Odorizzi | 28 | 28 | 171.7 | 11 | 17 | 0 | 1 | 28 | 1.000 | | 5 | 3 | .625 | 0 |
| | | Jeff Samardzija | 25 | 25 | 163.3 | 10 | 12 | 4 | 1 | 26 | .846 | | 14 | 3 | .824 | 0 |
| | | Marco Gonzales | 28 | 28 | 178.0 | 12 | 12 | 0 | 1 | 24 | 1.000 | | 5 | 4 | .556 | 0 |
| | | Craig Stammen | 58 | 0 | 72.7 | 6 | 9 | 1 | 4 | 16 | .938 | | 1 | 1 | .500 | 0 |
| | | Justin Dunn | 18 | 18 | 100.3 | 5 | 10 | 0 | 1 | 15 | 1.000 | | 4 | 4 | .500 | 0 |
| | n | James Paxton | 17 | 17 | 93.0 | 8 | 6 | 0 | 0 | 14 | 1.000 | | 4 | 1 | .800 | 1 |
| | | Robert Stephenson | 57 | 0 | 66.3 | 7 | 5 | 1 | 1 | 13 | .923 | | 1 | 1 | .500 | 0 |
| | | Felix Hernandez | 12 | 12 | 55.3 | 5 | 7 | 0 | 1 | 12 | 1.000 | | 3 | 1 | .750 | 0 |
| | | Nick Wittgren | 54 | 0 | 57.7 | 6 | 2 | 0 | 0 | 8 | 1.000 | | 0 | 1 | .000 | 1 |
| | | Chris Devenski | 53 | 0 | 66.0 | 4 | 4 | 0 | 0 | 8 | 1.000 | | 3 | 0 | 1.000 | 0 |
| | n | Ken Giles | 41 | 0 | 42.0 | 1 | 5 | 0 | 1 | 6 | 1.000 | | 2 | 0 | 1.000 | 0 |
| | n | Taylor Rogers | 50 | 0 | 49.0 | 1 | 4 | 0 | 1 | 5 | 1.000 | | 2 | 0 | 1.000 | 0 |
| | | JoJo Romero | 4 | 4 | 23.7 | 3 | 1 | 1 | 0 | 5 | .800 | | 2 | 0 | 1.000 | 0 |
| | n | Aaron Bummer | 47 | 0 | 42.7 | 0 | 4 | 0 | 0 | 4 | 1.000 | | 1 | 1 | .500 | 0 |
| | | Tyler Clippard | 32 | 0 | 32.3 | 2 | 2 | 0 | 0 | 4 | 1.000 | | 4 | 0 | 1.000 | 0 |
| | | Walker Lockett | 15 | 0 | 21.0 | 1 | 1 | 0 | 0 | 2 | 1.000 | | 1 | 0 | 1.000 | 0 |
| | | Dan Otero | 9 | 0 | 10.0 | 0 | 1 | 0 | 0 | 1 | 1.000 | | 0 | 0 | .000 | 0 |
| | | Griffin Canning | 5 | 5 | 25.0 | 1 | 0 | 0 | 0 | 1 | 1.000 | | 5 | 2 | .714 | 0 |
| | | Art Warren | 17 | 0 | 16.0 | 0 | 1 | 0 | 0 | 1 | 1.000 | | 0 | 1 | .000 | 0 |
| | | Total | 595 | 162 | 1439.7 | 96 | 121 | 8 | 16 | 225 | .964 | | 68 | 29 | .701 | 2 |
| | | | | | | | | | | | | | | | | |
| c | | Stephen Vogt | 92 | 76 | 702.0 | 690 | 27 | 6 | 2 | 723 | .992 | 7 | 42 | 14 | .750 | 0 |
| | | Austin Wynns | 92 | 86 | 737.7 | 676 | 32 | 4 | 1 | 712 | .994 | 7 | 26 | 15 | .634 | 1 |
| | | Total | 184 | 162 | 1439.7 | 1366 | 59 | 10 | 3 | 1435 | .993 | 14 | 68 | 29 | .701 | 1 |
| | | | | | | | | | | | | | | | | |
| 1b | | C.J. Cron | 112 | 111 | 992.7 | 940 | 80 | 6 | 75 | 1026 | .994 | | | | | |
| | | Greg Bird | 41 | 40 | 349.0 | 316 | 19 | 6 | 28 | 341 | .982 | | | | | |
| | | Ryon Healy | 11 | 11 | 96.0 | 81 | 5 | 0 | 7 | 86 | 1.000 | | | | | |
| | | Ian Desmond | 1 | 0 | 2.0 | 0 | 0 | 0 | 0 | 0 | .000 | | | | | |
| | | Total | 165 | 162 | 1439.7 | 1337 | 104 | 12 | 110 | 1453 | .992 | | | | | |
| | | | | | | | | | | | | | | | | |
| 2b | | Kevin Newman | 103 | 95 | 835.3 | 143 | 321 | 11 | 54 | 475 | .977 | | | | | |
| | | Tim Lopes | 70 | 66 | 595.3 | 116 | 213 | 4 | 37 | 333 | .988 | | | | | |
| | | Luis Guillorme | 2 | 1 | 9.0 | 4 | 3 | 0 | 1 | 7 | 1.000 | | | | | |
| | | Total | 175 | 162 | 1439.7 | 263 | 537 | 15 | 92 | 815 | .982 | | | | | |
| | | | | | | | | | | | | | | | | |
| 3b | | Luis Guillorme | 112 | 109 | 952.7 | 49 | 190 | 17 | 19 | 256 | .934 | | | | | |
| | | Ryon Healy | 31 | 26 | 237.0 | 16 | 40 | 7 | 4 | 63 | .889 | | | | | |
| | | Tim Lopes | 32 | 26 | 241.0 | 9 | 49 | 4 | 4 | 62 | .935 | | | | | |
| | | Adam Duvall | 1 | 1 | 9.0 | 1 | 1 | 0 | 0 | 2 | 1.000 | | | | | |
| | | Total | 176 | 162 | 1439.7 | 75 | 280 | 28 | 27 | 383 | .927 | | | | | |
| | | | | | | | | | | | | | | | | |
| ss | n | Francisco Lindor | 80 | 80 | 706.3 | 91 | 223 | 8 | 30 | 322 | .975 | | | | | |
| | | Didi Gregorius | 44 | 43 | 381.3 | 67 | 127 | 6 | 19 | 200 | .970 | | | | | |
| | | Kevin Newman | 41 | 39 | 344.0 | 44 | 121 | 5 | 19 | 170 | .971 | | | | | |
| | | Luis Guillorme | 5 | 0 | 8.0 | 0 | 6 | 0 | 0 | 6 | 1.000 | | | | | |
| | | Total | 170 | 162 | 1439.7 | 202 | 477 | 19 | 68 | 698 | .973 | | | | | |
| | | | | | | | | | | | | | | | | |
| lf | | Adam Duvall | 132 | 130 | 1158.3 | 249 | 6 | 4 | 1 | 259 | .985 | | | | | |
| | | Ian Desmond | 28 | 27 | 231.3 | 44 | 1 | 1 | 0 | 46 | .978 | | | | | |
| | | Phil Ervin | 5 | 2 | 23.0 | 6 | 0 | 0 | 0 | 6 | 1.000 | | | | | |
| | n | Domingo Santana | 3 | 3 | 27.0 | 4 | 1 | 0 | 0 | 5 | 1.000 | | | | | |
| | | Total | 168 | 162 | 1439.7 | 303 | 8 | 5 | 1 | 316 | .984 | | | | | |
| | | | | | | | | | | | | | | | | |
| cf | | Phil Ervin | 96 | 95 | 848.0 | 225 | 6 | 4 | 0 | 235 | .983 | | | | | |
| | n | Mookie Betts | 55 | 55 | 477.7 | 123 | 8 | 3 | 1 | 134 | .978 | | | | | |
| | | Corey Ray | 12 | 12 | 105.0 | 30 | 0 | 1 | 0 | 31 | .968 | | | | | |
| | | Kevin Newman | 1 | 0 | 8.0 | 2 | 0 | 0 | 0 | 2 | 1.000 | | | | | |
| | | Ian Desmond | 1 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 | .000 | | | | | |
| | | Total | 165 | 162 | 1439.7 | 380 | 14 | 8 | 1 | 402 | .980 | | | | | |
| | | | | | | | | | | | | | | | | |
| rf | n | Domingo Santana | 96 | 96 | 840.3 | 165 | 6 | 8 | 1 | 179 | .955 | | | | | |
| | | Corey Ray | 28 | 28 | 251.3 | 65 | 2 | 0 | 0 | 67 | 1.000 | | | | | |
| | | Phil Ervin | 15 | 15 | 135.0 | 31 | 1 | 0 | 0 | 32 | 1.000 | | | | | |
| | | Jared Oliva | 10 | 10 | 84.0 | 18 | 0 | 2 | 0 | 20 | .900 | | | | | |
| | | Tim Lopes | 13 | 8 | 79.0 | 9 | 0 | 0 | 0 | 9 | 1.000 | | | | | |
| | | Adam Duvall | 10 | 5 | 50.0 | 9 | 0 | 0 | 0 | 9 | 1.000 | | | | | |
| | | Total | 172 | 162 | 1439.7 | 297 | 9 | 10 | 1 | 316 | .968 | | | | | |
| | | | | | | | | | | | | | | | | |
| | | Total | 162 | 162 | 1439.7 | 4319 | 1609 | 115 | 115 | 6043 | .981 | 14 | | | | |