JD Martinez accomplished one of the rarest feats in baseball: 4 home runs in one game

Harry How/Getty Images J.D. Martinez made history on Monday night, becoming just the 18th player to hit four home runs in a single game. Martinez is the first player to accomplish the feat for the Diamondbacks, and it came at a time when Arizona is on one of the hottest stretches of the season, winning their past 11 games and leading the NL Wild Card race. To put the accomplishment in perspective, hitting four home runs in one game happens less oftenthan a perfect game. You can watch his fourth ...