Held the USBA middleweight title. Half-brother of the Great Marvin Hagler -Challenged for the middleweight world title twice. -Overpowered the legendary Roberto Duran. -Went to war with Doug DeWitt in two ferocious encounters. -KOed middleweight powerhouse Iran Barkley Mixed it up with the best of the best for over two decades, including names such as: Bobby Czyz, Iran Barkley, Doug DeWitt, Roberto Duran, Sumbu Kalambay, Nigel Benn and Vinny Pazienza. Where do you rate Robbie Sims greatness?