KANSAS CITY -- White Sox shortstop Tim Anderson had successful surgery on Thursday to repair the tear in his left middle finger, the club announced, and his expected return remains approximately six weeks.

Anderson suffered the injury on a check swing during his ninth-inning at-bat Saturday at Globe Life Field. He flew to Chicago on Sunday night, and an exam revealed the tear.

"Huge blow," said right-hander Lance Lynn, who allowed four runs over six frames in a 4-2 loss in Game 1 vs. the Royals."He's one of our All-Stars and one of our leaders."

Anderson was placed on the 10-day injured list with a sagittal band tear of the left middle finger. The club reinstated right-hander Reynaldo López from the 15-day IL.

Anderson, who had been scheduled to play Game 2 of Wednesday's doubleheader after serving a two-game suspension, leads the White Sox with a .301 batting average and was the starting shortstop for the American League at the All-Star Game in Los Angeles on July 19. He was the first White Sox shortstop to start the All-Star Game since Luis Aparicio in 1970. He is hitting .397 vs. left-handers.

Anderson will undergo surgery on Thursday in Chicago. The procedure will be performed by hand specialist Dr. John Fernandez of Midwest Orthopedics at RUSH, Oakbrook Surgery Center.