Paul Konerko hit a grand slam that wrecked Jon Lester’s bid for his 20th win, and the White Sox beat the Boston Red Sox 8-2 Thursday night in a game delayed because of a power failure.The game was held up for 21 minutes in the sixth inning when most of the stadium lights went out. A power outage in the area was the cause.Konerko connected for his 39th homer of the season and the ninth grand slam of his career. The fourth-inning shot off Lester (19-9) made it 6-2 and Dayan Viciedo chased the Red Sox ace with a two-run homer in the fifth.Lester was trying to become the first Red Sox left-hander in 57 years to win 20 games. He gave up eight runs and nine hits in four-plus innings in his final start of the season.Victor Martinez homered for Boston, which has four of its last five.Juan Pierre stole three bases, giving him a career-high 66, as the White Sox finished 6-1 against the Red Sox, and have won seven of eight since being eliminated from the AL Central.White Sox starter John Danks (15-11) pitched six innings and allowed two runs on five hits.Lester’s 15-inning scoreless streak ended in the first inning. Pierre hit a leadoff single, stole second and third and scored on a single by Andruw Jones.Pierre singled in the third, stole another base and scored on Jones’ bloop single.Lester ran into bigger trouble in the fourth. He allowed a leadoff double to Alejandro De Aza and issued walks to Pierre and Alexei Ramirez. Konerko connected for the game-breaking hit.Marco Scutaro led off the Boston third with a double. After a sacrifice by Darnell McDonald, Martinez hit his 20th home run.

NOTES—Before the game, Konerko acknowledged he would like to remain a member of the White Sox but also expressed interest in leaving his options open. Konerko is about to finish his final year of a five-year deal that he re-signed with the White Sox after they won the World Series in 2005. “Obviously it’s a business, so they have to figure out payroll stuff and when they do that, then hopefully I’m in their conversation, as far as being brought back,” he said. … Pierre stole 65 bases for the Marlins in 2003. … Danks and reliever Sergio Santos combined for six consecutive strikeouts in the sixth and seventh innings…..The Sox finish the season at home against Cleveland this weekend.