Boxing is generally a brutal sport. These tough athletes are always putting a themselves at risk when they step in the ring. The best highlighst that come from boxing are the knockouts. Some are expected in one-sided matches and then some just appear out of absolutely nowhere. Sometimes, it just takes a nice hook and a match can be over like that. From Money Mayweather's cheap shot of Victor Ortiz to Juan Manuel Marquez putting Manny Pacquiao to sleep, check out this GIF Gallery of The Most Brutal Boxing Knockouts of the Past 10 Years.