Thats over 2 years ago,and that was at Super feather. The fact that Broner is fighting at WW next and Mares was recently fighting at Superbantam tells its own story. Broner is at least 20 lbs heavier.
Like everyone said, Broner is way too big. Mares' frame was small compared to PDL at 126. There is no way he can beat a guy is going to fight at 147 lbs next. There's a 20 lb difference.