Which NFL coach holds the record for most regular season wins?

The answer is: Don Shula. At least for now, all-time NFL legend Don Shula still holds the record for most regular season wins as coach of the Baltimore Colts and Miami Dolphins. And he did so when many of those seasons were just 12 games, compared to the 17-game seasons of today.Those wins also include the only perfect season in NFL history with the 1972 Dolphins.Source