He KOd an inexperienced
Iran Barkley, outpointed
Doug DeWitt and rose to prominence as a middleweight contender by a very polemical defeating
Roberto Durán in 1986. Sims lost to
Sumbu Kalambay in a shot for the
WBA title in 1988. All his losses were on points except a knockout in the 7th round against
Nigel Benn. Sims was trained by famous Brockton based trainers Pat and
Goody Petronelli. He had a career record of 38-10-2 with 26 knockouts. ==Professional boxing record==