Finally over .500 for the first time in four months, the game series with the Cleveland Indians at U.S. Cellular Field.
Pierre had three of Chicago's 22 hits, none bigger than his opposite-field knock to left field off David Huff in the 14th. Gordon Beckham scored on the hit after reaching on a one-out double off Chad Durbin (2-2).
The White Sox's third straight win puts them over the .500 mark (61-60) for the first time since April 15. They are 3 1/2 games behind the first-place Tigers and a half-game behind the Tribe.
Charged with continuing the momentum is veteran lefty Mark Buehrle, who makes the 358th start of his big-league career and 44th against the Indians. The 32- year-old is 14-15 lifetime against Cleveland, having posted a 4.67 earned run average across 258 1/3 innings of work with 286 hits allowed and 148 strikeouts.
Buehrle has won his last four decisions, including a 6-3 verdict at Baltimore on Aug. 11, in which he allowed six hits and three runs in eight innings.
He hasn't lost since mid-June in Minnesota and the White Sox are 8-1 in his last nine starts.
The Indians go with 27-year-old Dominican righty Fausto Carmona, who makes his fifth try at a first win since July 18.
Carmona, a 13-game winner in 33 starts last season, picked up his fifth win of 2011 when he defeated Minnesota, 6-3, after allowing two runs on seven hits in six innings.
He's 0-2 with a pair of no-decisions since, including a 4-3 loss to Detroit in his last outing after going seven innings and surrendering three earned runs on seven hits.
Carmona is 7-5 in 15 career meetings with the White Sox with a 6.08 ERA in 74 innings. The Indians are 5-5 in his last 10 starts overall.
Chicago has won seven of its eight meetings with the Tribe this season.