BLOOMINGTON, Ind. — Indiana coach Kevin Wilson abruptly resigned Thursday, less than a week after the Hoosiers became bowl-eligible for the second straight season.

Athletic director Fred Glass made the announcement during a hastily arranged news conference and cited “philosophical differences” with Wilson. There were reports that Wilson had pushed players to return from injury and Glass said the issue was looked into by a law firm hired by the university.

“I understand there’s been a lot of back-and-forth about former players and those sorts of things,” he said. “I’ll just tell you we have no outstanding claims of medical cases.”

Glass also said no potential NCAA violations were involved. He said he and Wilson met early Thursday and continued a discussion they’d been having “for a few weeks,” with both concluding a change was needed.

“There is no smoking gun or single precipitating event that led to where we are today,” Glass said. “I think it’s really a realization by myself and Kevin that we’re not on the same page with key ways in which the program needs to be led.”

Defensive coordinator Tom Allen was promoted to take Wilson’s job, effective immediately. That at least avoids a coaching search even as Indiana (6-6, 4-5 Big Ten) waits to find out which bowl game it will play in, but there was little doubt the resignation was unexpected.