| Cap Timm | |
| Birth Date: | 4 June 1908 |
| Birth Place: | Arlington, Minnesota, U.S. |
| Death Place: | Ames, Iowa, U.S. |
| Alma Mater: | University of Minnesota |
| Player Sport1: | Football |
| Player Years1: | 1928–1931 |
| Player Team1: | Minnesota |
| Player Sport2: | Baseball |
| Player Years2: | 1929–1931 |
| Player Team2: | Minnesota |
| Player Positions: | Quarterback, Catcher |
| Coach Sport1: | Football |
| Coach Years1: | 1934–1955 |
| Coach Team1: | Iowa State (Asst) |
| Coach Sport2: | Men's Basketball |
| Coach Years2: | 1934–1953 |
| Coach Team2: | Iowa State (Asst) |
| Coach Sport3: | Baseball |
| Coach Years3: | 1938–1942 1947–1974 |
| Coach Team3: | Iowa State |
| Admin Years1: | 1934–1936 |
| Admin Team1: | Iowa State (Assistant AD) |
| Overall Record: | 340–373–5 |
| Championships: |
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Leroy Clinton "Cap" Timm (June 4, 1908 – August 7, 1987) was the longest tenured college baseball coach for the Iowa State University Cyclones located in Ames, Iowa and he held that position from the 1938 season through the 1942 season and again from the 1946 season through the 1974 season, with his tenure being interrupted due to service in World War II. In his tenure, he led Iowa State to three conference titles and two College World Series appearances. Timm died on August 7, 1987. He was inducted into the Iowa State Hall of Fame in 1997.[1] The school's ballpark, Cap Timm Field, is named in his honor.
Timm attended high school in Arlington, Minnesota, before attending the University of Minnesota. While attending Minnesota, Timm played as both a half and quarterback on the football team, and a catcher on the baseball team.[2]