 He KO'd Thomas Hayes (record 27–0–0–0) in September 2007, in round 1.On June 21, 2008, Arreola faced fellow undefeated prospect Chazz Witherspoon (23-0) and defeated him via disqualifaction.On November 29, 2008, Arreola faced Travis Walker and knocked him out early in the 3rd round, improving Arreola's record to 26-0.