HOUSTON (AP) — St. Louis Cardinals outfielder Matt Holliday will have surgery today (Wednesday) on his right thumb, an injury that could sideline him for the rest of the regular season. Holliday was hit by a 94 mph fastball from the Chicago Cubs’ Mike Montgomery last Thursday. Cardinals general manager John Mozeliak says Holliday could be sidelined through September.

The 36-year-old Holliday, a seven-time All-Star, is batting .242 this season with 19 home runs and 60 RBIs in 107 games. He would be eligible for free agency after the World Series if the Cardinals declined a $17 million option for next year and chose to pay a $1 million buyout.

Tommy Pham and Brandon Moss have seen time in left field in Holliday’s absence. Reliever Seth Maness was put on the 15-day disabled list and will have Tommy John surgery, which likely will sideline him until 2018. The Cardinals recalled right-hander Sam Tuivailala from Triple-A Memphis.