Id say Margarito, he TKOed a real p4p fighter in what I think was the most exciting fighter of the year, and also a good contender (Cintron) ,

The rest of the boxers mentioned all have some "holes" this year, which could count them out, though I am very close to saying B hop over Margarito,

anyway, these are the 'holes'

Bernard Hopkins - lost to calzaghe

Chad Dawson - Imo lost to Johnson or at best looked very bad vs Johnson

Timothy Bradley - awesome year but not fighting p4pounders like the rest on this list

Manny Pacquiao - questionable performance vs Marquez you could say. But his biggest test is coming up soon which would by far make him fighter of the year.