Any one who steps into the cage and fights for a living has "heart'" but which fighter have you seen show the most heart? At the top of my list is Urijah Faber. His fight with brown win he jacked up both hands and still went out there throwing elbows made me a fan for life. His fight with aldo also showed incredible heart after he was almost crippled and still kept limping back out there to answer the bell. That dude win or lose will be an all time great IMO.