career regular season statistics    
  
  | Year | Team | League | 
          W           
            Wins           
         | 
        
          L           
            Losses           
         | 
        
          ERA           
            Earned Run Average           
         | 
        
          G           
            Games           
         | 
        
          GS           
            Games Started           
         | 
        
          CG           
            Complete Games           
         | 
        
          SHO           
            Shutouts           
         | 
        
          SV           
            Saves           
         | 
        
          HLD           
            Holds           
         | 
        
          IP           
            Innings Pitched           
         | 
        
          H           
            Hits Allowed           
         | 
        
          R           
            Runs Allowed           
         | 
        
          ER           
            Earned Runs           
         | 
        
          HR           
            Home Runs Allowed           
         | 
        
          BB           
            Walks           
         | 
        
          SO           
            Strikeouts           
         | 
        
          WHIP           
            Walks and Hits Per Inning Pitched           
         | 
      
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | Atlanta | NL | 7 | 5 | 2.58 | 21 | 20 | 0 | 0 | 0 | 0 | 125.2 | 102 | 38 | 36 | 11 | 32 | 165 | 1.07 | 
| 2024 | Atlanta | NL | 18 | 3 | 2.38 | 29 | 29 | 0 | 0 | 0 | 0 | 177.2 | 141 | 48 | 47 | 9 | 39 | 225 | 1.01 | 
| 2023 | Boston | AL | 6 | 5 | 4.3 | 20 | 20 | 0 | 0 | 0 | 0 | 102.2 | 87 | 52 | 49 | 15 | 29 | 125 | 1.13 | 
| 2023 | Worcester | AAA | 0 | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 6.1 | 4 | 0 | 0 | 0 | 2 | 10 | 0.95 | |
| 2022 | Boston | AL | 0 | 1 | 3.18 | 2 | 2 | 0 | 0 | 0 | 5.2 | 5 | 3 | 2 | 0 | 1 | 5 | 1.06 | |
| 2022 | Worcester | AAA | 0 | 0 | 2.45 | 1 | 1 | 0 | 0 | 0 | 3.2 | 3 | 1 | 1 | 0 | 5 | 5 | 2.18 | |
| 2022 | Portland | AA | 0 | 0 | 2.25 | 1 | 1 | 0 | 0 | 0 | 4 | 4 | 1 | 1 | 0 | 0 | 7 | 1 | |
| 2022 | FCL Red Sox | R | 0 | 0 | 2.45 | 2 | 2 | 0 | 0 | 0 | 3.2 | 4 | 1 | 1 | 0 | 1 | 7 | 1.36 | |
| 2021 | Boston | AL | 5 | 1 | 3.16 | 9 | 9 | 0 | 0 | 0 | 0 | 42.2 | 45 | 19 | 15 | 6 | 12 | 52 | 1.34 | 
| 2021 | Worcester | AAA | 1 | 0 | 0.93 | 2 | 2 | 0 | 0 | 0 | 9.2 | 7 | 1 | 1 | 0 | 4 | 15 | 1.14 | |
| 2021 | Portland | AA | 0 | 0 | 2.45 | 2 | 2 | 0 | 0 | 0 | 7.1 | 6 | 2 | 2 | 1 | 1 | 15 | 0.95 | |
| 2021 | FCL Red Sox | R | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 3 | 4 | 0 | 0 | 0 | 0 | 5 | 1.33 | |
| 2020 | Boston-Injured | AL | - | - | |||||||||||||||
| 2019 | Boston | AL | 6 | 11 | 4.4 | 25 | 25 | 1 | 1 | 0 | 0 | 147.1 | 123 | 80 | 72 | 24 | 37 | 218 | 1.09 | 
| 2018 | Boston | AL | 12 | 4 | 2.11 | 27 | 27 | 0 | 0 | 0 | 0 | 158 | 102 | 39 | 37 | 11 | 34 | 237 | 0.86 | 
| 2017 | Boston | AL | 17 | 8 | 2.9 | 32 | 32 | 1 | 0 | 0 | 0 | 214.1 | 165 | 73 | 69 | 24 | 43 | 308 | 0.97 | 
| 2016 | Chicago WS | AL | 17 | 10 | 3.34 | 32 | 32 | 6 | 1 | 0 | 0 | 226.2 | 190 | 88 | 84 | 27 | 45 | 233 | 1.04 | 
| 2015 | Chicago WS | AL | 13 | 11 | 3.41 | 31 | 31 | 1 | 0 | 0 | 0 | 208.2 | 185 | 88 | 79 | 23 | 42 | 274 | 1.09 | 
| 2014 | Chicago WS | AL | 12 | 4 | 2.17 | 26 | 26 | 2 | 0 | 0 | 0 | 174 | 129 | 48 | 42 | 13 | 39 | 208 | 0.97 | 
| 2014 | Charlotte | AAA | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 4 | 1 | 0 | 0 | 0 | 2 | 11 | 0.75 | |
| 2013 | Chicago WS | AL | 11 | 14 | 3.07 | 30 | 30 | 4 | 1 | 0 | 0 | 214.1 | 184 | 81 | 73 | 23 | 46 | 226 | 1.07 | 
| 2012 | Chicago WS | AL | 17 | 8 | 3.05 | 30 | 29 | 1 | 0 | 0 | 0 | 192 | 167 | 66 | 65 | 19 | 51 | 192 | 1.14 | 
| 2011 | Chicago WS | AL | 2 | 2 | 2.79 | 58 | 0 | 0 | 0 | 8 | 16 | 71 | 52 | 22 | 22 | 6 | 27 | 79 | 1.11 | 
| 2010 | Chicago WS | AL | 2 | 1 | 1.93 | 21 | 0 | 0 | 0 | 4 | 2 | 23.1 | 15 | 5 | 5 | 2 | 10 | 32 | 1.07 | 
| 2010 | Charlotte | AAA | 0 | 0 | 2.84 | 7 | 0 | 0 | 0 | 0 | 6.1 | 3 | 2 | 2 | 2 | 4 | 15 | 1.11 | |
| 2010 | Winston-Salem | A | 0 | 0 | 2.25 | 4 | 0 | 0 | 0 | 0 | 4 | 3 | 2 | 1 | 0 | 2 | 4 | 1.25 | |
| 2010 | Fla. Gulf Coast | NCAA | 11 | 0 | 2.01 | 17 | 15 | 2 | 2 | 2 | 103 | 83 | 28 | 23 | 14 | 146 | 0.94 | ||
| 2009 | Fla. Gulf Coast | NCAA | 7 | 4 | 2.72 | 14 | 12 | 1 | 0 | 1 | 89.1 | 83 | 43 | 27 | 27 | 104 | 1.23 | ||
| 2008 | Fla. Gulf Coast | NCAA | 2 | 0 | 3.47 | 21 | 1 | 0 | 0 | 2 | 36.1 | 36 | 15 | 14 | 10 | 43 | 1.27 | ||
| Total | MLB | 145 | 88 | 3.01 | 393 | 312 | 16 | 3 | 12 | 18 | 2084 | 1692 | 750 | 697 | 213 | 487 | 2579 | 1.05 | |
| Total | AL | 120 | 80 | 3.1 | 343 | 263 | 16 | 3 | 12 | 18 | 1780.2 | 1449 | 664 | 614 | 193 | 416 | 2189 | 1.05 | |
| Total | NL | 25 | 8 | 2.46 | 50 | 49 | 0 | 0 | 0 | 0 | 303.1 | 243 | 86 | 83 | 20 | 71 | 390 | 1.04 | |
| Total | AAA | 1 | 0 | 1.35 | 10 | 3 | 0 | 0 | 0 | 20 | 11 | 3 | 3 | 2 | 10 | 41 | 1.05 | ||
| Total | AA | 0 | 0 | 2.45 | 2 | 2 | 0 | 0 | 0 | 7.1 | 6 | 2 | 2 | 1 | 1 | 15 | 0.95 | ||
| Total | A | 0 | 0 | 2.25 | 4 | 0 | 0 | 0 | 0 | 4 | 3 | 2 | 1 | 0 | 2 | 4 | 1.25 | ||
| Total | R | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 3 | 4 | 0 | 0 | 0 | 0 | 5 | 1.33 | ||
| Total | NCAA | 20 | 4 | 2.52 | 52 | 28 | 3 | 2 | 5 | 228.2 | 202 | 86 | 64 | 51 | 293 | 1.11 |