NFL coaches, the hardest-working men in human history.

But in the end, it's not that clear that these sleepless nights make that much of a difference. Miami missed the playoffs last year, as did Andy Reid's Eagles and Herm Edwards' Jets. The Bucs won their division but lost in the first round of the playoffs. The Super Bowl-winning Steelers are coached by Bill Cowher, who sleeps at home and rarely misses his kids' sports games. Cowher was also on the winning end of last night's Dolphins-Steelers matchup. As a man who is well acquainted with the joys of REM sleep, Cowher might not win any masculinity points from his fellow coaches. But at least he's alert enough to throw a challenge flag in time.