Shannon announced the firing today, one day after informing university officials of the decision. Shannon, who was promoted from defensive coordinator to head coach after the 2006 season, picked Walton to succeed him.

"This was a very difficult decision to make both personally and professionally," Shannon said in a statement released by the university. "It is my responsibility as head coach to evaluate all aspects of the football organization at the end of the season."

A call placed to Walton was not returned, and a request for comment sent to his university e-mail address was not answered.

Walton's job security was the subject of widespread speculation during the latter stages of the season, when Miami finished 5-7 and missed a bowl game for the first time since 1997.

The Hurricanes' defense — a longtime strength of the team — gave up 312 points this season, including 51 against Oklahoma and 48 in a shutout loss to Virginia in Miami's final home game at the Orange Bowl.