Orchard Park, N.Y. ? Mike Mularkey submitted his resignation to the Buffalo Bills on Thursday, a person familiar with discussions between the coach and the team told the Associated Press.

The Bills formally will announce the coach’s resignation during a press conference this morning. The person spoke on condition of anonymity because the official announcement had not been made.

ESPN.com, citing unidentified sources, first reported that Mularkey had reached a settlement with the team to cover the final three years of his contract. ESPN.com also reported that Mularkey’s decision to leave the team was because of undisclosed family reasons.