Team fielding -- 2021 Boston Red Sox
Regular season -- as of 10/3/2021
| Primary |
| Pos | S | Name | G | GS | INN | PO | A | E | DP | TC | PCT | PB | SB | CS | SB% | PK |
| p | | Luis Castillo | 41 | 41 | 227.0 | 9 | 23 | 2 | 1 | 34 | .941 | | 13 | 8 | .619 | 3 |
| | | Brandon Woodruff | 41 | 41 | 214.7 | 13 | 17 | 3 | 0 | 33 | .909 | | 21 | 4 | .840 | 1 |
| | | German Marquez | 40 | 40 | 232.7 | 20 | 13 | 0 | 0 | 33 | 1.000 | | 10 | 12 | .455 | 0 |
| | | Corey Kluber | 19 | 19 | 126.0 | 6 | 17 | 1 | 2 | 24 | .958 | | 5 | 8 | .385 | 2 |
| | | Jay Jackson | 67 | 0 | 83.3 | 10 | 4 | 1 | 0 | 15 | .933 | | 9 | 3 | .750 | 0 |
| | | Sandy Alcantara | 16 | 16 | 92.0 | 5 | 7 | 1 | 0 | 13 | .923 | | 2 | 3 | .400 | 0 |
| | | Mychal Givens | 63 | 0 | 87.0 | 2 | 9 | 2 | 0 | 13 | .846 | | 6 | 3 | .667 | 1 |
| | f | Kyle Gibson | 32 | 0 | 46.0 | 1 | 7 | 0 | 2 | 8 | 1.000 | | 2 | 2 | .500 | 1 |
| | | Archie Bradley | 55 | 0 | 75.7 | 0 | 8 | 0 | 2 | 8 | 1.000 | | 2 | 4 | .333 | 2 |
| | | Drew Rasmussen | 14 | 5 | 32.0 | 3 | 3 | 1 | 0 | 7 | .857 | | 7 | 0 | 1.000 | 1 |
| | | Will M. Smith | 54 | 0 | 57.0 | 3 | 2 | 0 | 0 | 5 | 1.000 | | 3 | 3 | .500 | 0 |
| | | Josh Taylor | 27 | 0 | 28.7 | 1 | 3 | 0 | 1 | 4 | 1.000 | | 0 | 0 | .000 | 0 |
| | | Austin L. Adams | 37 | 0 | 41.3 | 3 | 0 | 0 | 1 | 3 | 1.000 | | 2 | 4 | .333 | 0 |
| | | Jace Fry | 26 | 0 | 33.7 | 1 | 0 | 1 | 0 | 2 | .500 | | 2 | 0 | 1.000 | 0 |
| | f | Merrill Kelly | 3 | 0 | 4.7 | 0 | 1 | 0 | 0 | 1 | 1.000 | | 0 | 0 | .000 | 0 |
| | | Other | 54 | 0 | 65.7 | 3 | 5 | 0 | 0 | 8 | 1.000 | | 1 | 1 | .500 | 0 |
| | | Total | 589 | 162 | 1447.3 | 80 | 119 | 12 | 9 | 211 | .943 | | 85 | 55 | .607 | 11 |
| | | | | | | | | | | | | | | | | |
| c | | Buster Posey | 148 | 145 | 1269.3 | 1434 | 76 | 6 | 4 | 1516 | .996 | 4 | 78 | 50 | .609 | 1 |
| | | Wilson Garcia | 18 | 8 | 85.0 | 90 | 2 | 2 | 0 | 94 | .979 | 2 | 2 | 1 | .667 | 0 |
| | | Other | 21 | 9 | 93.0 | 108 | 6 | 0 | 0 | 114 | 1.000 | 0 | 5 | 4 | .556 | 1 |
| | | Total | 187 | 162 | 1447.3 | 1632 | 84 | 8 | 4 | 1724 | .995 | 6 | 85 | 55 | .607 | 2 |
| | | | | | | | | | | | | | | | | |
| 1b | | C.J. Cron | 158 | 158 | 1406.3 | 1268 | 95 | 5 | 103 | 1368 | .996 | | | | | |
| | | Christian Walker | 8 | 4 | 40.0 | 33 | 2 | 1 | 4 | 36 | .972 | | | | | |
| | | Wilson Garcia | 1 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 | .000 | | | | | |
| | | Total | 167 | 162 | 1447.3 | 1301 | 97 | 6 | 107 | 1404 | .996 | | | | | |
| | | | | | | | | | | | | | | | | |
| 2b | | Ozzie Albies | 162 | 162 | 1439.3 | 238 | 448 | 9 | 87 | 695 | .987 | | | | | |
| | | Christian Arroyo | 5 | 0 | 7.0 | 0 | 1 | 0 | 0 | 1 | 1.000 | | | | | |
| | | Donovan Solano | 1 | 0 | 1.0 | 1 | 0 | 0 | 0 | 1 | 1.000 | | | | | |
| | | Total | 168 | 162 | 1447.3 | 239 | 449 | 9 | 87 | 697 | .987 | | | | | |
| | | | | | | | | | | | | | | | | |
| 3b | | Matt Chapman | 162 | 162 | 1438.3 | 78 | 329 | 17 | 30 | 424 | .960 | | | | | |
| | | Christian Walker | 5 | 0 | 5.0 | 0 | 2 | 0 | 0 | 2 | 1.000 | | | | | |
| | | Donovan Solano | 1 | 0 | 2.0 | 0 | 1 | 0 | 0 | 1 | 1.000 | | | | | |
| | | Christian Arroyo | 1 | 0 | 2.0 | 0 | 0 | 0 | 0 | 0 | .000 | | | | | |
| | | Total | 169 | 162 | 1447.3 | 78 | 332 | 17 | 30 | 427 | .960 | | | | | |
| | | | | | | | | | | | | | | | | |
| ss | | Didi Gregorius | 162 | 162 | 1411.0 | 161 | 449 | 7 | 69 | 617 | .989 | | | | | |
| | | Christian Arroyo | 20 | 0 | 32.3 | 4 | 9 | 1 | 1 | 14 | .929 | | | | | |
| | | Braden Shewmake | 1 | 0 | 3.0 | 1 | 1 | 0 | 0 | 2 | 1.000 | | | | | |
| | | Ozzie Albies | 1 | 0 | 1.0 | 0 | 1 | 0 | 0 | 1 | 1.000 | | | | | |
| | | Total | 184 | 162 | 1447.3 | 166 | 460 | 8 | 70 | 634 | .987 | | | | | |
| | | | | | | | | | | | | | | | | |
| lf | f | Cody Bellinger | 54 | 54 | 466.3 | 103 | 3 | 1 | 0 | 107 | .991 | | | | | |
| | f | Ronald Acuna Jr. | 34 | 34 | 296.0 | 61 | 0 | 1 | 0 | 62 | .984 | | | | | |
| | | Christian Walker | 37 | 37 | 330.0 | 57 | 2 | 2 | 0 | 61 | .967 | | | | | |
| | | Robbie Grossman | 39 | 26 | 255.0 | 43 | 0 | 2 | 0 | 45 | .956 | | | | | |
| | | Trent Grisham | 9 | 9 | 82.0 | 15 | 2 | 0 | 0 | 17 | 1.000 | | | | | |
| | | Socrates Brito | 2 | 2 | 18.0 | 1 | 0 | 0 | 0 | 1 | 1.000 | | | | | |
| | | Total | 175 | 162 | 1447.3 | 280 | 7 | 6 | 0 | 293 | .980 | | | | | |
| | | | | | | | | | | | | | | | | |
| cf | f | Ronald Acuna Jr. | 61 | 61 | 544.0 | 123 | 2 | 2 | 0 | 127 | .984 | | | | | |
| | | Socrates Brito | 57 | 57 | 489.0 | 111 | 2 | 3 | 1 | 116 | .974 | | | | | |
| | f | Cody Bellinger | 40 | 34 | 315.0 | 61 | 2 | 2 | 0 | 65 | .969 | | | | | |
| | | Trent Grisham | 10 | 10 | 85.0 | 10 | 0 | 0 | 0 | 10 | 1.000 | | | | | |
| | | Robbie Grossman | 8 | 0 | 14.3 | 6 | 0 | 0 | 0 | 6 | 1.000 | | | | | |
| | | Total | 176 | 162 | 1447.3 | 311 | 6 | 7 | 1 | 324 | .978 | | | | | |
| | | | | | | | | | | | | | | | | |
| rf | | Trent Grisham | 134 | 134 | 1191.3 | 207 | 7 | 7 | 0 | 221 | .968 | | | | | |
| | | Nelson Cruz | 16 | 16 | 144.0 | 24 | 1 | 0 | 0 | 25 | 1.000 | | | | | |
| | f | Cody Bellinger | 11 | 11 | 99.0 | 22 | 3 | 0 | 1 | 25 | 1.000 | | | | | |
| | | Socrates Brito | 1 | 1 | 9.0 | 1 | 0 | 0 | 0 | 1 | 1.000 | | | | | |
| | f | Ronald Acuna Jr. | 2 | 0 | 3.0 | 1 | 0 | 0 | 0 | 1 | 1.000 | | | | | |
| | | Robbie Grossman | 1 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 | .000 | | | | | |
| | | Total | 165 | 162 | 1447.3 | 255 | 11 | 7 | 1 | 273 | .974 | | | | | |
| | | | | | | | | | | | | | | | | |
| | | Total | 162 | 162 | 1447.3 | 4342 | 1565 | 80 | 113 | 5987 | .987 | 6 | | | | |
