OAKLAND—Mark Buehrle was so locked in he didn’t even notice the malfunctioning stadium radar gun clock one of his first-inning pitches at 800 mph.The left-hander only seemed that dominant.Buehrle pitched a four-hitter on the one-year anniversary of his perfect game and the White Sox beat the Oakland Athletics 5-1 on Friday.Buehrle (9-8) was nearly flawless through six innings against Oakland before giving up a run in the seventh that ended a scoreless streak of 26 1/3 innings by White Sox starters. He then retired the final eight batters to finish his second straight complete game.Buehrle struck out two and didn’t walk a batter for the third time in his last four starts. He also earned his first career win in Oakland.Buehrle pitched a perfect game against Tampa Bay last season but got off to a rocky start this year, losing five straight decisions at one point. He’s rebounded nicely, going 6-2 with a 2.20 ERA over his last eight starts.Carlos Quentin drove in two runs in his return to the lineup and Omar Vizquel added two hits to move past Luke Appling into 50th place on baseball’s career hit list, helping the Sox increase their lead to 2½ games over Detroit in the AL Central.Quentin had not played since getting hit in his right wrist against Minnesota last Sunday.One of the White Sox top hitters before getting hurt, Quentin picked up where he left off. He drew a pair of walks, knocked in Alex Rios with a sacrifice fly in the fourth then drove in Vizquel with a groundout in the sixth.A.J. Pierzynski added a two-run single in the ninth off Oakland reliever Henry Rodriguez.That’s an encouraging sign for the Sox, who have won three of four on this road trip since dropping three of four at home against Minnesota.Oakland All-Star Trevor Cahill (9-4) lost for the second time in four starts. The right-hander scattered four hits and allowed three runs over seven innings but got little offensive support from his teammates.Jack Cust doubled twice and drove in the A’s only run.The A’s, who announced before the game that they signed catcher Kurt Suzuki to a new four-year contract, lost for only the second time in nine games.

NOTES—Oakland GM Billy Beane said he doesn’t anticipate trading RHP Ben Sheets, who signed a $10 million one-year deal in the offseason. Sheets (4-9) scuffled early in the season but has a 3.37 ERA over his last five starts….The White Sox plan to use a closer by committee approach for the next few days while RHP Bobby Jenks works out his kinks. Jenks has 20 saves this season but has been struggling lately and took the loss after blowing a save against Seattle on Wednesday. “We’re a better ballclub when Bobby is the guy to close it,” Ozzie Guillen said. “We’re going to put him in spots, maybe one day or two days, to see if we can regroup him.”