Guerrier surgery among Cubs' injury updates

CHICAGO -- Cubs pitcher Matt Guerrier underwent surgery Friday to repair the flexor mass in his right arm, and he will be sidelined six to eight months. Dr. Timothy Kremchek performed the procedure.

Acquired from the Dodgers in the Carlos Marmol trade, Guerrier was 2-1 with a 2.13 ERA in 15 games with the Cubs. The right-hander does not have a contract for next season, and he said before the procedure that he would like to come back to Chicago.

The Cubs did get good news on outfielder Brian Bogusevic, who has been rehabbing a strained left hamstring since July 15. Bogusevic was expected to join Triple-A Iowa to continue his rehab, and he could be activated soon. The outfielder has been playing with the AZL Cubs in the Arizona League. In six games, he was batting .286 (6-for-21), and he has played center field in four of his six games.

Infielder Luis Valbuena, sidelined since Aug. 3 with a strained right oblique, has been able to swing a fungo bat, but has yet to hit. He is able to play catch from a short distance.

Outfielder Ryan Sweeney, on the disabled list since June 30 with a left rib fracture, has been able to hit in the batting cage. He's expected to return in September.