By Mark Gonzales PHOENIX - After watching Jose Contreras retire 12 of the 13 batters he faced, Bartolo Colon stated his own case Saturday to become the White Sox's fourth starter. Relying on a tailing fastball, Colon struck out six in five innings to complete the Sox's 2-0 victory over Arizona. Colon allowed three hits, but one was an infield hit and the other was a broken-bat single. He struck out the first four batters he faced and retired the first eight batters. Colon threw 54 of 72 pitches for strikes, while Contreras threw 37 of 55 pitches for strikes while walking none and striking out three. The Diamondbacks didn't put two runners on base until two out in the ninth on a bloop single by Josh Wilson and a walk to Alex Romero. But Colon struck out Mark Reynolds, who foul tipped a pitch that umpire Jim Reynolds ruled that catcher Corky Miller caught. Colon is demonstrating what general manager Ken Williams anticipated this spring, that Colon has the ability to suddenly increase his velocity while locking up left-handed hitters by moving them off the plate, only to run his fastball back to the inside corner. His fastball was clocked at 93 mph.