Jay Cutler vs. Philip Rivers
Sparks flew when two of the league's most outspoken young quarterbacks met in a Monday Night Football game in December 2007. Rivers and Cutler were caught jawing at each other as Cutler was walking off the field following a failed fourth-down conversion. When asked last October on "The Best Damn Sports Show Period" if he thought Rivers was "kind of an ass," Cutler responded by saying he's "not a big fan of the guy." The feeling is obviously mutual.