"I'm hoping it's day to day," Bochy said. "He'll deal with his finger, and if he gets the swelling down, he's good to go tomorrow."
Bochy noted Posey was fortunate it was his ring finger that took the brunt of the blow and not one of the digits used to grip the ball.
Posey was replaced in the lineup by Hector Sanchez, who batted seventh. Johnny Monell, who had his contract purchased from Triple-A Fresno on Tuesday, will serve as Sanchez's backup. Monell, a seven-year Minor Leaguer, is awaiting his Major League debut.
AJ Cassavell is a reporter for MLB.com. Follow him on Twitter @ajcassavell. This story was not subject to the approval of Major League Baseball or its clubs.