It isn't hard to list off some of the greatest coaches in sports history—Red Auerbach, Vince Lombardi, Scotty Bowman and Tony LaRussa, to name a few.
But who are the worst?
Who are the coaches that compiled such a horrendous record they deserve to be remembered for their ineptitude? Which coaches turned good teams into rotten ones? Who are the coaches that alienated players, gave up on their teams and clearly were overmatched?
John Wooden once said, "I don't believe in praying to win."
But the following coaches probably should have given it a shot.
(Note: This article is focused on professional coaches from the NFL, NBA, NHL and MLB so as to provide a more focused scope. It only takes into account a coach's career in the professional ranks, as a few coaches listed here are well-renowned college coaches. This list only deals with time spent as a head coach.)