| Most Overall Appearances | |||
| Season: | 26 | Brandon Cichocki | 2014 |
| Career: | 69 | Brandon Cichocki | 2013-16 |
| Most Starting Appearances | |||
| Season: | 14 | Evan Lovick | 2018 |
| 14 | Danny Cody | 2018 | |
| 14 | Dawson Gabe | 2022 | |
| Career: | 38 | Dale Koler | 2001-04 |
| Most Relief Appearances | |||
| Season: | 26 | Brandon Cichocki | 2014 |
| Career: | 69 | Brandon Cichocki | 2013-16 |
| Innings Pitched | |||
| Season: | 88.2 | Bernie Bonhotel | 1988 |
| Career: | 272.1 | Pat George | 1974-77 |
| Complete Games | |||
| Season: | 8 | Dean Obrock | 1986 |
| 8 | Bernie Bonhotel | 1988 | |
| Career: | 20 | Max Newill | 1995-98 |
| Wins | |||
| Season: | 11 | Garrett Miller | 2023 |
| Career: | 24 | Evan Lovick | 2015-18 |
| Losses | |||
| Season: | 7 | Pat George | 1977 |
| 7 | Mark Pettigrew | 1977 | |
| Career: | 18 | Mike Blake | 1967-70 |
| 18 | Pat George | 1974-77 | |
| Saves | |||
| Season: | 9 | Brandon Cichocki | 2014 |
| Career: | 15 | Brandon Cichocki | 2013-16 |
| Win-Loss Record | |||
| Season (Min. 5 Wins) | 1.000 | Garrett Miller | 11-0 in 2023 |
| Season (Min. 5 Wins) | 1.000 | Brian Kosar | 8-0 in 1990 |
| 1.000 | Curt Karpinksi | 6-0 in 1972 | |
| 1.000 | Heath Baker | 6-0 in 2002 | |
| .900 | Danny Cody | 9-1 in 2019 | |
| .900 | Tyler Walker | 9-1 in 2024 | |
| Career (Min. 10 Wins) | .800 | Evan Lovick | 24-6 in 2015-18 |
| Strikeouts | |||
| Consecutive: | 17 | Jerry Seuess | 1953 |
| Game: | 25 | Bob Love | 1966 (14 innings) |
| Season: | 100 | Danny Cody | 2018 |
| 98 | Danny Cody | 2019 | |
| Career: | 313 | Pat George | 1974-77 |
| Most Hits Allowed | |||
| Season: | 97 | Walt Kendzierski | 1985 |
| Career: | 245 | Jamie Barton | 1993-96 |
| Evan Lovick | 2015-18 | ||
| Fewest Hits Allowed per Game | |||
| Game: | 0 | Bob Love vs. Otterbein | 1965 |
| 0 | Jeff Burton vs. Heidelberg | 1980 | |
| 0 | Aaron Krieger vs. Ohio Northern | 2005 | |
| 0 | Josh Scott vs. Ohio Valley Christian | 2011 | |
| Season: | 1.37 | Jake Heatherington | 2024 |
| 2.14 | Drew Wilson | 2022 | |
| Career: | 2.88 | Drew Wilson | 2019-22 |
| Most Walks Allowed | |||
| Season: | 48 | Dawson Gabe | 2022 |
| Career: | 114 | Scott Medvin | 1980-83 |
| 114 | Dawson Gabe | 2019-23 | |
| Fewest Walks Allowed per Game | |||
| Season (min. 15 Appearances): | 0.61 | Justin Novak | 2010 |
| 0.61 | Drew Wilson | 2022 | |
| Career: | 0.772 | Drew Wilson | 2019-22 |
| Hit Batters | |||
| Season: | 16 | Danny Cody | 2019 |
| Career: | 28 | Garrett Miller | 2019-24 |
| Wild Pitches | |||
| Season: | 12 | Mike Laub | 1993 |
| 12 | Jim Ressler | 1999 | |
| 12 | Jake Heatherington | 2024 | |
| Career: | 31 | Mike Laub | 1992-95 |
| Runs Allowed | |||
| Season: | 56 | Matt Palumbo | 1991 |
| Career: | 143 | Dave Skok | 1987-90 |
| Earned Runs | |||
| Season: | 51 | Eric Scheetz | 1999 |
| Career: | 122 | Heath Baker | 2000-03 |