Treadwell, who played at Miami from 1978-80, was in his third year as the coach at his alma mater. In addition to the five losses this year, the RedHawks went 4-8 in each of Treadwell's first two seasons.
"I have decided to make a change in our football leadership now in hopes of seeing improved performance for the rest of the season," Miami-Ohio Athletic Director David Sayler said. "Miami University takes the interest of our student-athletes seriously and this decision is the result of the past nine months since I've been on the job."
Miami dropped a 21-9 decision to Central Michigan in its Mid-American Conference opener Saturday. The RedHawks have been outscored 178-44 in their first five games and are yet to score more than 14 points in a game.
Mike Bath, who played quarterback at Miami 1998-2000, was named interim coach. He is in his sixth season of being on the school's football staff and most recently coached the quarterbacks and wide receivers.
Treadwell was the offensive coordinator when he was hired to replace Michael Haywood, who left Miami after just two seasons to become the coach at Pittsburgh. Haywood never coached at Pittsburgh, however, because of domestic violence charges filed against him about two weeks after he accepted the job.