CLEVELAND — Corey Kluber, sidelined most of the month with a strained lower back, is expected to rejoin the Cleveland Indians rotation on Thursday against Oakland.

Cleveland's ace right-hander hasn't pitched since May 2 when he left his start against Detroit after three innings. He threw five scoreless innings for Double-A Akron on a minor league rehab assignment Friday.

Kluber is 3-2 with a 5.06 ERA in six starts. He pitched 249 1/3 innings last season, including 34 1/3 in the playoffs. Kluber also pitched on three days rest three times during the post-season, two coming against the Chicago Cubs in the World Series.

Kluber was 18-9 with a 3.14 ERA and two shutouts in the regular season and went 4-1 with a 1.83 ERA in six playoff starts. He won the AL Cy Young Award in 2014 and was third in the voting last season.

Indians manager Terry Francona didn't say whose spot Kluber will take in the rotation.