TOLEDO, Ohio -- Cincinnati Reds left-hander Aroldis Chapman made his professional debut on Sunday, striking out nine in 4 2/3 innings for the Triple-A Louisville Bats.
Chapman allowed just an unearned run on five hits, throwing 55 of 85 pitches for strikes against the Toledo Mud Hens.
He retired the side in order in the first inning and at one point retired eight straight batters, striking out five in that stretch. He topped 100 mph on the radar gun five times.
Chapman, who defected from Cuba during the offseason, signed a six-year, $30.25 million contract with the Reds and was competing for a spot in the team's starting rotation until back spasms delayed his spring training preparation.