Quintana will try to ensure the White Sox stay atop the AL Central after Wednesday night's series finale against the visiting Royals.The trade acquisition of Francisco Liriano gave the White Sox the chance to give Quintana eight days off between starts. The rookie might have needed all that time after matching career highs of six runs and 10 hits allowed in Chicago's 7-6 loss at Minnesota on July 30."The most important part is my arm, and my arm feels great," Quintana told the team's official website through a translator.He did not get the decision in that start against the Twins, keeping his three-game winning streak intact. The left-hander has allowed four or more runs in three of his last four outings, though, and struggled against the Royals (46-63) last month.Quintana (4-1, 2.80 ERA) gave up five runs, eight hits and a career high-tying three walks over his five innings in Kansas City on July 13. He did not get a decision in a 9-8 win, a start that came after seven days off because of the All-Star break.Quintana will try to help the White Sox (60-49) rebound from Tuesday's 5-2 loss. Kansas City's Alex Gordon broke a 2-all tie with a single in the seventh inning and Billy Butler tacked on a two-run homer in the eighth to help Kansas City end a season-high, six-game road losing streak."I think the last couple days we've had renewed energy, renewed vision, and I'm pleased with where we're at right now," manager Ned Yost said.Coupled with Detroit's sixth consecutive win, Tuesday's defeat knocked the White Sox's edge in the division down to one-half game over the Tigers. A matchup with Royals starter Jeremy Guthrie (0-3, 7.71) may help Chicago hold on to that lead.Guthrie, acquired from Colorado on July 19, has dropped nine consecutive decisions since an 11-5 win over Houston on May 31. He's lost all three of his starts for the Royals, though he did have his best outing for them Friday against Texas.Guthrie gave up three runs over six innings against the Rangers after allowing a combined 11 runs over his previous two starts, but did not get enough support in a 5-3 loss."That's the best start we've seen from him," Yost said. "It was great to see him get on track. He was getting his fastball up to 95 (mph) and executing pitches. ... He kept us in the ballgame. He kept us one swing away."Guthrie has had trouble doing that in his last three starts against the White Sox, going 0-2 with a 6.10 ERA.It's unknown if Guthrie will have to face Kevin Youkilis or Alejandro De Aza. Youkilis was scratched from Tuesday's game because of a sore right knee, and De Aza is dealing with tightness in his back.