Team fielding -- 2018 Seattle Mariners
Regular season -- as of 9/25/2018
| Primary |
| Pos |  | Name | G | GS | INN | PO | A | E | DP | TC | PCT | PB | SB | CS | SB% | PK |
| p | | J.A. Happ | 29 | 29 | 179.3 | 11 | 16 | 6 | 1 | 33 | .818 | | 2 | 3 | .400 | 1 |
| | | Taijuan Walker | 30 | 30 | 186.7 | 11 | 15 | 6 | 3 | 32 | .813 | | 11 | 1 | .917 | 0 |
| | | James Paxton | 27 | 27 | 168.7 | 13 | 14 | 0 | 0 | 27 | 1.000 | | 0 | 2 | .000 | 0 |
| | | Drew Pomeranz | 32 | 32 | 204.3 | 7 | 17 | 3 | 1 | 27 | .889 | | 8 | 3 | .727 | 0 |
| | | Chris Rusin | 69 | 0 | 97.3 | 9 | 10 | 0 | 1 | 19 | 1.000 | | 2 | 1 | .667 | 0 |
| | | Jake Odorizzi | 29 | 29 | 176.3 | 4 | 11 | 2 | 0 | 17 | .882 | | 3 | 1 | .750 | 0 |
| | | Juan Nicasio | 70 | 0 | 75.3 | 2 | 13 | 0 | 2 | 15 | 1.000 | | 4 | 2 | .667 | 1 |
| | f | Trevor Rosenthal | 61 | 0 | 58.0 | 3 | 8 | 0 | 1 | 11 | 1.000 | | 3 | 4 | .429 | 0 |
| | | Taylor Rogers | 62 | 0 | 50.3 | 2 | 7 | 0 | 0 | 9 | 1.000 | | 0 | 0 | .000 | 0 |
| | | Robert Stephenson | 8 | 8 | 40.3 | 3 | 5 | 1 | 1 | 9 | .889 | | 2 | 1 | .667 | 0 |
| | | Dellin Betances | 73 | 0 | 68.3 | 2 | 6 | 0 | 1 | 8 | 1.000 | | 6 | 2 | .750 | 1 |
| | | Brandon Morrow | 45 | 0 | 48.0 | 2 | 4 | 1 | 0 | 7 | .857 | | 3 | 1 | .750 | 0 |
| | | Pedro Baez | 31 | 0 | 35.7 | 3 | 2 | 0 | 0 | 5 | 1.000 | | 0 | 0 | .000 | 0 |
| | | Andrew Moore | 9 | 5 | 39.3 | 2 | 2 | 0 | 0 | 4 | 1.000 | | 0 | 1 | .000 | 0 |
| | | Nick Wittgren | 13 | 0 | 18.3 | 4 | 0 | 0 | 0 | 4 | 1.000 | | 0 | 0 | .000 | 0 |
| | | Aaron Bummer | 15 | 0 | 11.7 | 1 | 2 | 0 | 0 | 3 | 1.000 | | 0 | 0 | .000 | 0 |
| | | Cory Gearrin | 23 | 0 | 25.0 | 0 | 1 | 0 | 0 | 1 | 1.000 | | 1 | 0 | 1.000 | 0 |
| | | Marco Gonzales | 2 | 2 | 6.7 | 0 | 1 | 0 | 0 | 1 | 1.000 | | 0 | 0 | .000 | 0 |
| | | Total | 628 | 162 | 1489.7 | 79 | 134 | 19 | 11 | 232 | .918 | | 45 | 22 | .672 | 3 |
| | | | | | | | | | | | | | | | | |
| c | | Jonathan Lucroy | 133 | 128 | 1128.0 | 1170 | 33 | 8 | 8 | 1211 | .993 | 7 | 31 | 14 | .689 | 1 |
| | | Chris Gimenez | 62 | 34 | 361.7 | 358 | 19 | 0 | 0 | 377 | 1.000 | 8 | 14 | 8 | .636 | 2 |
| | | Total | 195 | 162 | 1489.7 | 1528 | 52 | 8 | 8 | 1588 | .995 | 15 | 45 | 22 | .672 | 3 |
| | | | | | | | | | | | | | | | | |
| 1b | | Justin Smoak | 158 | 158 | 1446.3 | 1229 | 100 | 4 | 114 | 1333 | .997 | | | | | |
| | | Ryon Healy | 3 | 3 | 27.3 | 24 | 1 | 1 | 2 | 26 | .962 | | | | | |
| | | Adrian Gonzalez | 4 | 1 | 16.0 | 16 | 2 | 0 | 4 | 18 | 1.000 | | | | | |
| | | Total | 165 | 162 | 1489.7 | 1269 | 103 | 5 | 120 | 1377 | .996 | | | | | |
| | | | | | | | | | | | | | | | | |
| 2b | | Scooter Gennett | 139 | 136 | 1254.3 | 245 | 373 | 15 | 78 | 633 | .976 | | | | | |
| | | Ruben Tejada | 16 | 15 | 134.3 | 32 | 30 | 1 | 11 | 63 | .984 | | | | | |
| | | Marco Hernandez | 12 | 11 | 101.0 | 13 | 28 | 2 | 3 | 43 | .953 | | | | | |
| | | Total | 167 | 162 | 1489.7 | 290 | 431 | 18 | 92 | 739 | .976 | | | | | |
| | | | | | | | | | | | | | | | | |
| 3b | | Jake Lamb | 146 | 146 | 1287.3 | 65 | 220 | 20 | 26 | 305 | .934 | | | | | |
| | | Ryan Schimpf | 23 | 10 | 131.3 | 8 | 23 | 4 | 2 | 35 | .886 | | | | | |
| | | Marco Hernandez | 13 | 5 | 59.0 | 1 | 9 | 3 | 1 | 13 | .769 | | | | | |
| | | Ryon Healy | 1 | 1 | 8.0 | 1 | 3 | 0 | 0 | 4 | 1.000 | | | | | |
| | | Scooter Gennett | 1 | 0 | 2.0 | 0 | 0 | 0 | 0 | 0 | .000 | | | | | |
| | | Ruben Tejada | 1 | 0 | 2.0 | 0 | 0 | 0 | 0 | 0 | .000 | | | | | |
| | | Total | 185 | 162 | 1489.7 | 75 | 255 | 27 | 29 | 357 | .924 | | | | | |
| | | | | | | | | | | | | | | | | |
| ss | | Francisco Lindor | 159 | 159 | 1441.7 | 185 | 476 | 15 | 66 | 676 | .978 | | | | | |
| | | Marco Hernandez | 4 | 1 | 22.0 | 9 | 8 | 2 | 4 | 19 | .895 | | | | | |
| | | Ruben Tejada | 5 | 2 | 26.0 | 3 | 10 | 0 | 1 | 13 | 1.000 | | | | | |
| | | Total | 168 | 162 | 1489.7 | 197 | 494 | 17 | 71 | 708 | .976 | | | | | |
| | | | | | | | | | | | | | | | | |
| lf | | Nick Markakis | 150 | 150 | 1369.3 | 284 | 13 | 6 | 3 | 303 | .980 | | | | | |
| | | Boog Powell | 16 | 12 | 109.3 | 28 | 1 | 0 | 0 | 29 | 1.000 | | | | | |
| | | Chris Gimenez | 5 | 0 | 11.0 | 3 | 0 | 0 | 0 | 3 | 1.000 | | | | | |
| | | Total | 171 | 162 | 1489.7 | 315 | 14 | 6 | 3 | 335 | .982 | | | | | |
| | | | | | | | | | | | | | | | | |
| cf | | Max Kepler | 144 | 143 | 1308.0 | 365 | 10 | 2 | 1 | 377 | .995 | | | | | |
| | | Boog Powell | 25 | 19 | 179.7 | 41 | 2 | 1 | 0 | 44 | .977 | | | | | |
| | | Adrian Gonzalez | 1 | 0 | 2.0 | 0 | 0 | 0 | 0 | 0 | .000 | | | | | |
| | | Total | 170 | 162 | 1489.7 | 406 | 12 | 3 | 1 | 421 | .993 | | | | | |
| | | | | | | | | | | | | | | | | |
| rf | | Mookie Betts | 153 | 152 | 1393.7 | 292 | 10 | 5 | 3 | 307 | .984 | | | | | |
| | | Nick Markakis | 11 | 10 | 90.0 | 17 | 1 | 0 | 1 | 18 | 1.000 | | | | | |
| | | Boog Powell | 1 | 0 | 6.0 | 1 | 0 | 0 | 0 | 1 | 1.000 | | | | | |
| | | Total | 165 | 162 | 1489.7 | 310 | 11 | 5 | 4 | 326 | .985 | | | | | |
| | | | | | | | | | | | | | | | | |
| | | Total | 162 | 162 | 1489.7 | 4469 | 1506 | 108 | 131 | 6083 | .982 | 15 | | | | |