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| ANA | BAL | BOS | CGY | CIN | CLE | COL | DET | HOU | LOS | MIL |
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| Team Index | Draft History | Starters: Positional - Pitchers | Registers: Batters - Pitchers | Leaders: Batters - Pitchers | Transaction Log | Injury Log |
 | Seattle Mariners 2021 Stats |
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| Record102-60, .630 - Finish 1st - Runs Scored 888 - Runs Allowed 729 |
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| Catcher Fielding Stats | | Player | Inn | GS | G | PO | A | E | DP | | | | | Carlos Camino | 330.1 | 23 | 36 | 278 | 16 | 3 | 1 | .990 | 8.01 | | | Siro Cruz | 255.1 | 31 | 35 | 214 | 14 | 2 | 0 | .991 | 8.04 | | | Carlos Ramirez | 5.2 | 1 | 1 | 4 | 0 | 0 | 0 | 1.000 | 6.35 | | | Ralph Ward | 8.2 | 1 | 1 | 3 | 0 | 0 | 0 | 1.000 | 3.12 | | | Team Totals | 600.0 | 56 | 73 | 499 | 30 | 5 | 1 | .991 | | | | Last 2 columns are Fielding Percentage and Range Factor (except Catcher where last column is Runners Thrown Out Percentage) |
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| First Base Fielding Stats | | Player | Inn | GS | G | PO | A | E | DP | | | | | Carlos Ramirez | 1312.2 | 149 | 152 | 1236 | 90 | 6 | 117 | .995 | 9.09 | | | Siro Cruz | 142.0 | 13 | 22 | 144 | 14 | 0 | 17 | 1.000 | 10.01 | | | Felix Marker | 10.2 | 2 | 2 | 9 | 0 | 0 | 1 | 1.000 | 7.59 | | | Ralph Ward | 5.0 | 1 | 1 | 1 | 0 | 0 | 0 | 1.000 | 1.80 | | | Team Totals | 1470.1 | 165 | 177 | 1390 | 104 | 6 | 135 | .996 | | | | Last 2 columns are Fielding Percentage and Range Factor (except Catcher where last column is Runners Thrown Out Percentage) |
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| Second Base Fielding Stats | | Player | Inn | GS | G | PO | A | E | DP | | | | | Anthony Beckner | 1323.0 | 146 | 149 | 264 | 445 | 11 | 96 | .985 | 4.82 | | | Randy Toohey | 131.1 | 16 | 17 | 20 | 39 | 0 | 10 | 1.000 | 4.04 | | | Andrew Usry | 4.0 | 2 | 2 | 2 | 1 | 0 | 1 | 1.000 | 6.75 | | | Matthew Ricciardi | 7.0 | 1 | 1 | 4 | 2 | 0 | 0 | 1.000 | 7.71 | | | Team Totals | 1465.1 | 165 | 169 | 290 | 487 | 11 | 107 | .986 | | | | Last 2 columns are Fielding Percentage and Range Factor (except Catcher where last column is Runners Thrown Out Percentage) |
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| Third Base Fielding Stats | | Player | Inn | GS | G | PO | A | E | DP | | | | | Andrew Usry | 1251.1 | 144 | 145 | 77 | 247 | 16 | 15 | .953 | 2.33 | | | Matthew Ricciardi | 162.2 | 16 | 25 | 4 | 33 | 4 | 1 | .902 | 2.05 | | | Randy Toohey | 45.1 | 2 | 13 | 2 | 8 | 0 | 1 | 1.000 | 1.99 | | | Arthur Dennison | 4.0 | 1 | 1 | 0 | 2 | 0 | 0 | 1.000 | 4.50 | | | Team Totals | 1463.1 | 163 | 184 | 83 | 290 | 20 | 17 | .949 | | | | Last 2 columns are Fielding Percentage and Range Factor (except Catcher where last column is Runners Thrown Out Percentage) |
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| Shortstop Fielding Stats | | Player | Inn | GS | G | PO | A | E | DP | | | | | Yohachi Shosuke | 1339.0 | 156 | 160 | 187 | 456 | 22 | 92 | .967 | 4.32 | | | Randy Toohey | 62.0 | 5 | 17 | 7 | 22 | 0 | 5 | 1.000 | 4.21 | | | Wilfredo Andujar | 34.2 | 16 | 16 | 7 | 12 | 1 | 4 | .950 | 4.93 | | | Matthew Ricciardi | 24.2 | 1 | 6 | 4 | 16 | 0 | 1 | 1.000 | 7.30 | | | Anthony Beckner | 9.0 | 3 | 3 | 2 | 7 | 0 | 2 | 1.000 | 9.00 | | | Siro Cruz | 1.0 | 1 | 1 | 1 | 0 | 0 | 0 | 1.000 | 9.00 | | | Team Totals | 1470.1 | 182 | 203 | 208 | 513 | 23 | 104 | .969 | | | | Last 2 columns are Fielding Percentage and Range Factor (except Catcher where last column is Runners Thrown Out Percentage) |
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| Left Field Fielding Stats | | Player | Inn | GS | G | PO | A | E | DP | | | | | Alex Starks | 742.2 | 82 | 88 | 173 | 8 | 4 | 4 | .978 | 2.19 | | | James Sheehan | 690.0 | 77 | 80 | 145 | 4 | 3 | 1 | .980 | 1.94 | | | Ralph Ward | 33.2 | 3 | 9 | 8 | 1 | 1 | 0 | .900 | 2.41 | | | Irwin Straub | 4.0 | 1 | 1 | 1 | 0 | 0 | 0 | 1.000 | 2.25 | | | Team Totals | 1470.1 | 163 | 178 | 327 | 13 | 8 | 5 | .977 | | | | Last 2 columns are Fielding Percentage and Range Factor (except Catcher where last column is Runners Thrown Out Percentage) |
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| Center Field Fielding Stats | | Player | Inn | GS | G | PO | A | E | DP | | | | | Bill Cullison | 1252.0 | 139 | 145 | 382 | 4 | 6 | 2 | .985 | 2.77 | | | Alex Starks | 168.2 | 20 | 22 | 59 | 2 | 1 | 1 | .984 | 3.25 | | | Felix Marker | 17.0 | 8 | 8 | 6 | 0 | 0 | 0 | 1.000 | 3.18 | | | Ralph Ward | 24.0 | 2 | 4 | 3 | 0 | 0 | 0 | 1.000 | 1.13 | | | Siro Cruz | 2.2 | 1 | 1 | 2 | 0 | 0 | 0 | 1.000 | 6.75 | | | James Sheehan | 6.0 | 1 | 1 | 0 | 0 | 0 | 0 | .000 | 0.00 | | | Team Totals | 1470.1 | 171 | 181 | 452 | 6 | 7 | 3 | .985 | | | | Last 2 columns are Fielding Percentage and Range Factor (except Catcher where last column is Runners Thrown Out Percentage) |
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| Right Field Fielding Stats | | Player | Inn | GS | G | PO | A | E | DP | | | | | Felix Marker | 1166.0 | 130 | 134 | 278 | 5 | 0 | 0 | 1.000 | 2.18 | | | James Sheehan | 182.0 | 21 | 21 | 42 | 1 | 0 | 0 | 1.000 | 2.13 | | | Alex Starks | 99.0 | 11 | 13 | 27 | 0 | 2 | 0 | .931 | 2.45 | | | Claver Valenzuela | 21.2 | 11 | 11 | 1 | 0 | 0 | 0 | 1.000 | 0.42 | | | Carlos Camino | 10.0 | 1 | 1 | 2 | 0 | 0 | 0 | 1.000 | 1.80 | | | Siro Cruz | 1.2 | 1 | 1 | 0 | 0 | 0 | 0 | .000 | 0.00 | | | Team Totals | 1480.1 | 175 | 181 | 350 | 6 | 2 | 0 | .994 | | | | Last 2 columns are Fielding Percentage and Range Factor (except Catcher where last column is Runners Thrown Out Percentage) |
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