Kelly has 388 strikeouts and has taken the mound for 457 innings so far in his MLB career. His WHIP is 1.280 and his earned run average is 4.16 (211 earned runs allowed). He has 133 walks and has given up 452 base knocks (8.9 hits per nine innings). Kelly (29-32 career win-loss record) has faced 1,920 opposing batters and he has a FIP of 4.09 in the major leagues.
| Year | Team | G | IP | W | L | WHIP | ERA | H | BB | SO | FIP | SV | GS | HR | ER | R | BF | SO/W | H/9 | SO/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Career | 79 | 456.9 | 29 | 32 | 1.280 | 4.16 | 452 | 133 | 388 | 4.09 | 0 | 79 | 60 | 211 | 221 | 1,920 | 2.92 | 8.9 | 7.6 | |
| 2022 | ARI | 15 | 84.0 | 6 | 5 | 1.298 | 3.64 | 79 | 30 | 71 | 3.32 | 0 | 15 | 5 | 34 | 35 | 351 | 2.37 | 8.5 | 7.6 |
| 2021 | ARI | 27 | 158.0 | 7 | 11 | 1.291 | 4.44 | 163 | 41 | 130 | 4.11 | 0 | 27 | 21 | 78 | 82 | 667 | 3.17 | 9.3 | 7.4 |
| 2020 | ARI | 5 | 31.1 | 3 | 2 | 0.989 | 2.59 | 26 | 5 | 29 | 3.99 | 0 | 5 | 5 | 9 | 9 | 125 | 5.80 | 7.5 | 8.3 |
| 2019 | ARI | 32 | 183.1 | 13 | 14 | 1.315 | 4.42 | 184 | 57 | 158 | 4.51 | 0 | 32 | 29 | 90 | 95 | 777 | 2.77 | 9.0 | 7.8 |
2022 Stats for Merrill Kelly
| Stat | Total | MLB Rank |
|---|---|---|
| Wins | 6 | 28th |
| Losses | 5 | 37th |
| Win-Loss Percentage | .545 | 220th |
| Earned Run Average (ERA) | 3.64 | 511th |
| Games Played | 15 | 269th |
| Games Started | 15 | 30th |
| Games Finished | 0 | 621st |
| Complete Games | 0 | 40th |
| Shutouts | 0 | 38th |
| Saves | 0 | 170th |
| Innings Pitched | 84 | 33rd |
| Hits Allowed | 79 | 27th |
| Runs Allowed | 35 | 51st |
| Earned Runs Allowed | 34 | 42nd |
| Home Runs Allowed | 5 | 156th |
| Walks | 30 | 25th |
| Intentional Walks | 1 | 40th |
| Strikeouts | 71 | 51st |
| Hit Batters | 1 | 223rd |
| Balks | 1 | 13th |
| Wild Pitches | 4 | 27th |
| Batters Faced | 351 | 28th |
| ERA+ | 114 | 267th |
| FIP | 3.32 | 614th |
| WHIP | 1.298 | 476th |
| Hits Allowed Per 9 Innings | 8.5 | 455th |
| Home Runs Allowed Per 9 Innings | 0.5 | 582nd |
| Walks Per 9 Innings | 3.2 | 440th |
| Strikeouts Per 9 Innings | 7.6 | 487th |
| Strikeout to Walk Ratio | 2.4 | 357th |
2021 Stats for Merrill Kelly
| Stat | Total | MLB Rank |
|---|---|---|
| Wins | 7 | 110th |
| Losses | 11 | 24th |
| Win-Loss Percentage | .389 | 522nd |
| Earned Run Average (ERA) | 4.44 | 616th |
| Games Played | 27 | 385th |
| Games Started | 27 | 61st |
| Games Finished | 0 | 1001st |
| Complete Games | 0 | 564th |
| Shutouts | 0 | 555th |
| Saves | 0 | 669th |
| Innings Pitched | 158 | 43rd |
| Hits Allowed | 163 | 23rd |
| Runs Allowed | 82 | 32nd |
| Earned Runs Allowed | 78 | 26th |
| Home Runs Allowed | 21 | 54th |
| Walks | 41 | 90th |
| Intentional Walks | 3 | 65th |
| Strikeouts | 130 | 69th |
| Hit Batters | 4 | 200th |
| Balks | 0 | 632nd |
| Wild Pitches | 2 | 393rd |
| Batters Faced | 667 | 44th |
| ERA+ | 96 | 526th |
| FIP | 4.11 | 501st |
| WHIP | 1.291 | 533rd |
| Hits Allowed Per 9 Innings | 9.3 | 446th |
| Home Runs Allowed Per 9 Innings | 1.2 | 586th |
| Walks Per 9 Innings | 2.3 | 916th |
| Strikeouts Per 9 Innings | 7.4 | 773rd |
| Strikeout to Walk Ratio | 3.2 | 279th |
2020 Stats for Merrill Kelly
| Stat | Total | MLB Rank |
|---|---|---|
| Wins | 3 | 103rd |
| Losses | 2 | 198th |
| Win-Loss Percentage | .600 | 213th |
| Earned Run Average (ERA) | 2.60 | 559th |
| Games Played | 5 | 559th |
| Games Started | 5 | 166th |
| Games Finished | 0 | 651st |
| Complete Games | 0 | 395th |
| Shutouts | 0 | 388th |
| Saves | 0 | 458th |
| Innings Pitched | 31 | 153rd |
| Hits Allowed | 26 | 190th |
| Runs Allowed | 9 | 379th |
| Earned Runs Allowed | 9 | 341st |
| Home Runs Allowed | 5 | 164th |
| Walks | 5 | 492nd |
| Intentional Walks | 1 | 102nd |
| Strikeouts | 29 | 192nd |
| Hit Batters | 1 | 332nd |
| Balks | 0 | 418th |
| Wild Pitches | 0 | 572nd |
| Batters Faced | 125 | 168th |
| ERA+ | 175 | 126th |
| FIP | 3.99 | 704th |
| WHIP | 0.989 | 499th |
| Hits Allowed Per 9 Innings | 7.5 | 516th |
| Home Runs Allowed Per 9 Innings | 1.4 | 357th |
| Walks Per 9 Innings | 1.4 | 725th |
| Strikeouts Per 9 Innings | 8.3 | 464th |
| Strikeout to Walk Ratio | 5.8 | 45th |
2019 Stats for Merrill Kelly
| Stat | Total | MLB Rank |
|---|---|---|
| Wins | 13 | 31st |
| Losses | 14 | 7th |
| Win-Loss Percentage | .481 | 412th |
| Earned Run Average (ERA) | 4.42 | 595th |
| Games Played | 32 | 288th |
| Games Started | 32 | 27th |
| Games Finished | 0 | 886th |
| Complete Games | 0 | 504th |
| Shutouts | 0 | 499th |
| Saves | 0 | 602nd |
| Innings Pitched | 183 | 29th |
| Hits Allowed | 184 | 21st |
| Runs Allowed | 95 | 21st |
| Earned Runs Allowed | 90 | 16th |
| Home Runs Allowed | 29 | 24th |
| Walks | 57 | 31st |
| Intentional Walks | 4 | 31st |
| Strikeouts | 158 | 46th |
| Hit Batters | 2 | 404th |
| Balks | 0 | 551st |
| Wild Pitches | 4 | 167th |
| Batters Faced | 777 | 25th |
| ERA+ | 101 | 421st |
| FIP | 4.51 | 611th |
| WHIP | 1.315 | 558th |
| Hits Allowed Per 9 Innings | 9.0 | 503rd |
| Home Runs Allowed Per 9 Innings | 1.4 | 496th |
| Walks Per 9 Innings | 2.8 | 723rd |
| Strikeouts Per 9 Innings | 7.8 | 641st |
| Strikeout to Walk Ratio | 2.8 | 341st |