most career wins by a coach in
Only the quarterback and head coach are credited with win-loss records. The success of the coach is measured by his victories. If a coach does not produce winning teams, he does not have a long career in the NFL. As of the 2013 season, only 94 coaches, about 20%, have won 50 or more games. At the time of the 1970 NFL-AFL merger, George Halas held the record for most regular-season wins as a head coach. Halas had four stints as coach of the Bears. He retired after the 1967 season with 318 wins. Twenty-eight years later, Halas was surpassed by Don Shula.