"All the world's a stage," a pretty fair playwright named Bill Shakespeare once assured us. Elite athletes are attracted to that stage, and rabid sports fans drop big money to watch what happens on that stage, since it represents "such stuff as dreams are made on." But with a fabulous Super Bowl behind us, "the winter of our discontent" is upon us, and part of our focus shifts to the inevitably ugly business side of sports.

In Indianapolis, will mercurial Colts owner Jim Irsay pony up the $28 million roster bonus due rehabbing franchise quarterback Peyton Manning on March 8? In Orlando, will the never-ending drama over peerless center Dwight Howard and his nearly $20 million price tag lead to his exit? What to make of these shenanigans? Vent anger and frustration: "A plague on both your houses"? Or lament the inevitability of a split that once seemed so perfect: "Parting is such sweet sorrow"?

We've already witnessed this sort of nastiness between Brett Favre and the Green Bay Packers, LeBron James and the Cleveland Cavaliers, and even Jackie Robinson and the Brooklyn Dodgers, to name just a few. Will we see the Colts-Manning clash and the Magic-Howard dustup descend into the gutter?

"O, what men dare do!" We can't know. So whatever is "to be, or not to be," here's a look at the Top 10 Ugliest Breakups in Sports.