He previously served as head coach at Stanford and an assistant with USA Softball, Kansas, Washington, Minnesota, and Oregon.
[3] In July 1996, Rittman became head coach at Stanford, a program that became a varsity sport in the 1994 season.
[5] As head coach from 1997 to 2014, Rittman had a cumulative 750–351–3 record and one Pac-10 title in 2005,[6][3] with 16 consecutive NCAA Division I Softball Championship appearances from 1998 to 2013, five Super Regionals, and two Women's College World Series berths in 2001 and 2004.
Rittman resigned from Stanford on June 2, 2014 after the team finished 5–19 in Pac-12 Conference games that season.
[12][13] He then spent two seasons at Kansas as associate head coach in 2015 and 2017, and also two stints as an assistant with USA Softball.