Mark Prior allowed only one hit in six innings and retired 18 of his 19 batters Sunday, outpitching Jon Garland to send the Chicago Cubs to a 2-0 victory over the White Sox. "I felt pretty good," Prior said. "Most athletes know if they're ready or not." Corey Patterson's solo homer in the sixth broke a scoreless tie for the Cubs, who took two of three on the road to split the season series at three games apiece. The White Sox won two of three at Wrigley Field in May. Making his first start since May 27, when a line drive fractured a bone in his right elbow, Prior (5-1) dominated the White Sox, who have the best record in baseball. He struck out three and did not walk a batter. After allowing a single to Pablo Ozuna in the third, Prior retired his final 10 batters and erased any doubts about whether he was ready to return. While he was out, Prior threw two simulated games but did not make any minor league rehabilitation starts. "After the first simulated game, I didn't feel ready. After the second one, I did," said Prior, who threw 71 pitches -- 50 for strikes. "I just tried to go out there and throw a good game."