Craig Kimbrel and Carlos Marmol are tied for fanning the most hitters in the 9th inning in a season, with 120 strikeouts.
| NAME | SO | SEASON | TM | G | H | HR | BB | HBP | IBB | K/BB | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | C. Kimbrel | 120 | 2011 |  ATL | 71 | 41 | 3 | 30 | 1 | 1 | 4.00 |
| 2 |  | C. Marmol | 120 | 2010 |  CHC | 71 | 36 | 1 | 45 | 7 | 3 | 2.67 |
| 3 | | E. Gagne | 113 | 2003 |  LAD | 67 | 24 | 1 | 11 | 2 | 0 | 10.27 |
| 4 | | C. Kimbrel | 112 | 2012 | ATL | 61 | 25 | 3 | 13 | 2 | 0 | 8.62 |
| 5 |  | C. Kimbrel | 111 | 2017 |  BOS | 64 | 31 | 6 | 12 | 4 | 0 | 9.25 |
| 6 |  | E. DÃaz | 110 | 2018 |  SEA | 65 | 30 | 5 | 16 | 6 | 0 | 6.88 |
| 7 |  | A. Chapman | 107 | 2015 |  CIN | 62 | 38 | 3 | 28 | 4 | 1 | 3.82 |
| 8 | | O. Dotel | 102 | 2004 | TOT | 72 | 55 | 12 | 26 | 3 | 5 | 3.92 |
| 9 | | A. Chapman | 101 | 2013 | CIN | 61 | 35 | 7 | 24 | 3 | 0 | 4.21 |
| 10 | | J. Broxton | 99 | 2009 | LAD | 67 | 39 | 4 | 22 | 1 | 1 | 4.50 |
| 11 | | F. Bautista | 97 | 2023 |  BAL | 55 | 30 | 4 | 24 | 1 | 0 | 4.04 |
| 12 |  | K. Jansen | 97 | 2014 | LAD | 65 | 47 | 4 | 14 | 0 | 1 | 6.93 |
| 13 |  | J. Hader | 96 | 2024 |  HOU | 71 | 41 | 12 | 23 | 1 | 1 | 4.17 |
| 14 | | K. Yates | 96 | 2019 |  SDP | 58 | 37 | 1 | 12 | 7 | 1 | 8.00 |
| 15 | | K. Jansen | 96 | 2016 | LAD | 66 | 28 | 4 | 9 | 2 | 2 | 10.67 |
| 16 | | E. Gagne | 96 | 2002 | LAD | 70 | 51 | 5 | 11 | 2 | 4 | 8.73 |
| 17 | | A. Chapman | 95 | 2014 | CIN | 52 | 20 | 1 | 23 | 2 | 0 | 4.13 |
| 18 |  | E. DÃaz | 94 | 2022 |  NYM | 50 | 31 | 3 | 14 | 0 | 0 | 6.71 |
| 19 |  | A. Chapman | 93 | 2021 |  NYY | 57 | 33 | 8 | 35 | 2 | 1 | 2.66 |
| 20 | | K. Jansen | 93 | 2017 | LAD | 61 | 38 | 5 | 7 | 1 | 0 | 13.29 |
| 21 | | G. Holland | 91 | 2013 |  KCR | 60 | 38 | 3 | 16 | 0 | 1 | 5.69 |
| 22 | | C. Kimbrel | 91 | 2013 | ATL | 60 | 36 | 4 | 19 | 1 | 2 | 4.79 |
| 23 | | B. Wagner | 91 | 2010 | ATL | 64 | 31 | 5 | 19 | 1 | 2 | 4.79 |
| 24 | | B. Wagner | 91 | 1999 |  HOU | 53 | 22 | 3 | 14 | 0 | 0 | 6.50 |
| 25 |  | J. Hader | 90 | 2019 |  MIL | 50 | 26 | 7 | 10 | 1 | 1 | 9.00 |
StatMuse has event-level data for strikeouts going back to the 1974 season.
Some of the information used here was obtained free of charge from Retrosheet.
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