Jose Contreras threw four shutout innings and Bartolo Colon followed with five more, leading the Chicago White Sox over the Arizona Diamondbacks 2-0 on Saturday at Chase Field.

Contreras gave up one single while throwing 55 pitches, and Colon gave up three singles and walked one while throwing 72 pitches. Question marks entering the spring, the two have made Chicago's starting rotation behind Mark Buehrle, Gavin Floyd and John Danks.

Contreras, who underwent surgery after suffering a season-ending Achilles' injury Aug. 8, was 3-0 with a 5.82 ERA in 17 innings. Colon (0-2, 6.60) hasn't pitched a full season since winning 21 games and the AL Cy Young Award in 2005 because of shoulder, elbow and oblique muscle injuries. He had surgery to remove bone chips in the offseason.