He was the interim head coach of the Michigan Wolverines baseball team from October 2001 to May 2002.
[1][2] During Harrison's single year as head coach, the Michigan baseball team led the Big Ten Conference in pitching but finished the season with a 21-32 record (14-17 in the Big Ten).
[3] Harrison resigned as head coach in late May 2002;[4] he was replaced in June 2002 by Rich Maloney.
[5][6] In 1991, he led the Master's Mustangs to a school record 28 victories and was named the NAIA District 3 Coach of the Year.
After the team finished at 14-32-2 in 1992, Harrison resigned at the request of school officials.