He led the Falcons to a 21-12 record - a nine-game improvement - in his first year at Bowling Green.
The Falcons went 1-1 in the CollegeInsider.com Tournament after an 11-7 mark in the Mid-American Conference.
In the statement issued by the athletic department, the university said ''Jans' public conduct failed to meet his obligations as a head coach.'' The university didn't specify what the conduct was.
Assistant Mark Downey is taking over day-to-day operations of the program while a search for a replacement begins.