CHICAGO — Shane Bieber pitched two-run ball into the eighth inning, and the Cleveland Guardians beat the Chicago White Sox 4-2 on Thursday night for a three-game series sweep.

Cleveland opened a seven-game lead over Chicago in the AL Central with its 15th win in 18 games. The Guardians (83-67) can clinch the franchise’s first division title since 2018 as early as Sunday.

Bieber (12-8) earned his fourth straight win. The 2020 AL Cy Young Award winner allowed seven hits, struck out five and walked none in 7 2/3 innings.

Trevor Stephan finished the eighth and Emmanuel Clase handled the ninth for his AL-best 37th save in 41 chances.

Gavin Sheets homered for Chicago in the eighth. Johnny Cueto (7-9) allowed four runs, three earned, and eight hits in six innings in his third straight loss.

The White Sox (76-74) have dropped three straight and four of six overall.

Cleveland went ahead to stay on Jose Ramirez’s sacrifice fly in the third. Steven Kwan hit an RBI triple in the fifth and scored on another Ramirez sacrifice fly, giving the Guardians a 4-1 lead.

The White Sox, who started September with an 8-2 streak but failed to make up much ground on the streaking Guardians, got a run in the first on Eloy Jimenez’s RBI single.

BAD THROW

The Guardians’ second run was set up by a Cueto pickoff attempt that bounced in front of first baseman Jose Abreu’s glove in the third. The ball rolled to the dugout fence and allowed Amed Rosario to dash from first to third. He came home a pitch later on Ramirez’s sacrifice fly.

TRAINER’S ROOM

Guardians: RHP Zach Plesac (broken finger) could get a start or two before the end of the season, but manager Terry Francona said it only will happen if Plesac is ready. He has been out since Aug. 30.

UP NEXT

Guardians: Cody Morris (0-2, 2.30 ERA) faces Texas right-hander Jon Gray (7-7, 3.80 ERA) on Friday night.

White Sox: RHP Lucas Giolito (10-9, 5.07 ERA) goes against Tigers on Friday night.