Aroldis Chapman

After four seasons of dominance at the Minor League level, Aroldis Chapman, also known as the "Cuban Missile," made his MLB debut. The 6-foot-4, left-handed flamethrower fired a perfect eighth inning in the late-summer contest between the Cincinnati Reds and the Milwaukee Brewers. Chapman fanned the first batter he faced with a wipeout, backdoor slider and would get the next two hitters to ground out. Aroldis wielded an overpowering fastball that hovered into the triple digits and topped out at 102 mph.