It wasn't all on Borges. Yes, Denard was a serious Heisman candidate for the first few weeks of 2010.
His opponents were UConn, Notre Dame in Brian Kelly's first year, UMass, Bowling Green, and Indiana.
Then Denard threw 3 picks against MSU and got knocked out of the Iowa game.
Lots of people are Heisman candidates after Week 5. That doesn't mean they're the best player in the nation.