Pat Chambers resigned after the university said it investigated new allegations of inappropriate conduct. In July, a Black former player said Chambers referenced "noose" around the player's neck.
The NCAA Division I Council voted to push the start date back two weeks from Nov. 10, saying most of its schools will have ended in-person classes for the fall semester by then, reducing exposures.
The Big Ten, which includes Michigan and Ohio State, and the Pac-12, which includes Stanford and USC, put off playing college sports this fall as confirmed virus cases in the U.S. rise.
"If there is to be college sports in the fall, we need to get a much better handle on the pandemic," said NCAA President Mark Emmert.
The Ivy League has put all sports on hold until at least January, while Stanford plans to discontinue 11 of its 36 varsity programs after this academic year.