LeRoy "Cap" Timm came to Iowa State College (University) as a Professor of Education and an assistant football coach in 1934. He was also an assistant basketball coach and junior varsity baseball coach. Timm was best known as Iowa State's head baseball coach from 1937-1974. He led the Cyclones to three Big 8 titles, two College World Series appearances, and was named NCAA Baseball Coach of the Year once (1957) and Big 8 Coach of the Year twice (1957, 1970). Iowa State's baseball facility was named Cap Timm Field in his honor. The collection contains biographical information, professional and personal correspondence, photographs, handwritten notes, and a scrapbook from the Pro Football Hall of Fame.

LeRoy "Cap" Timm was born in Arlington, Minnesota, on June 4, 1908. He received his BS (1931) from the University of Minnesota and his MA (1933) from New York University. After a short period of time as an assistant football coach at Minnesota, Timm came to Iowa State College (University) as a Professor of Education (1934-1978) and an assistant football coach (1934-1955). He then became the head coach of baseball (1937-1974), assistant basketball coach (1938-1950), and junior varsity baseball coach (1975-1978). Timm retired from Iowa State University in 1978 and was named Professor Emeritus the next year. 

Timm was best known for coaching the Iowa State University baseball team, leading the Cyclones to three Big 8 titles (1957, 1970, 1971) and two College World Series appearances (1957, 1970). He was named NCAA Baseball Coach of the Year (1957) and Big 8 Coach of the Year (1957, 1970). Timm also led the United States baseball team to a gold medal in the 1967 Pan American Games. Cap Timm Field, home to ISU baseball until it was eliminated as a varsity sport (2001), was named in his honor (1974). 

Timm married Glendora "Tippy" Briley in 1939. They had two children, Tommy and Susanne. Tippy passed away in 1982, followed by "Cap" in 1987, and Susanne in 2005. Cap and Tippy are buried at the Iowa State University Cemetery.

The collection (1930s-1987) contains biographical information, professional and personal correspondence, and photographs from Timm's time at Iowa State University.  There are also handwritten notes on many subjects and a scrapbook given to him from the Pro Football Hall of Fame.

The collection is organized alphabetically with biographical information at the beginning.