11:36 AM ET 03.31 | This is the offseason that could decide the fate of Detroit Lions general manager Martin Mayhew. That's a fact regardless of whether anyone in the organization would ever state it so bluntly. Mayhew's precarious position explains why the Lions have been extremely active in free agency, signing running back Reggie Bush, safety Glover Quin and defensive end Jason Jones. They kept safety Louis Delmas and cornerback Chris Houston, but allowed the overpriced duo of tackle Gosder Cherilus and defensive end Cliff Avril to walk. Mayhew knows there has to be a sense of urgency, even if he hasn't admitted that the 2013 season could determine his future in Detroit.