Bill Walsh checks in at No. 2 on ESPN's list of Greatest Coaches in NFL History, leaving the as-yet-unnamed Vince Lombardi as the obvious No. 1.Walsh, of course, led the San Francisco 49ers to three of their five Super Bowl victories. He revived the franchise with a blueprint that became standard operating procedure across the league. He blazed trails in minority hiring and produced a coaching tree with branches still growing in the game today.I highly recommend checking out Seth Wickersham's piece on Walsh from January.