If Sanchez and Penn went the distance it would be hands down number 1. Penn out landed him something like 127-8 over the fight and nearly every round was a 10-8 round. Hell the first round could have easily been 10-7. But since it did not go the distance it does not meet the criteria for this.
I would have to say Franklin/The Crow. Because Franklin not only whooped him all over the place he did it with like 3 injuries. Busted knuckle, hurt foot and if I remember he injured his shoulder as well? If you are beating a guy so bad you hurt yourself in the process, that is without a doubt the most one sided ass kicking in history.