Renan Barão, Daniel Cormier heavy favorites in UFC 173 mismatches

Renan Barão looks to keep his 33-match unbeaten streak intact against T.J. Dillashaw.

Jeff Bottari/Zuffa LLC/Zuffa LLC

It's tricky business for the UFC to be selling us a pay card topped by two apparent mismatches. The thing is, though, what really pushes fans to fork over the dough to watch is star power. Barão doesn't have it, whether because of the language barrier or a lack of stout challenges. Maybe that'll change someday, perhaps when Dominick Cruz returns to reclaim the belt he believes is his. But for now, for UFC 173, the stars will be shining most brightly in the co-main event.