OAKLAND, Calif. — Brandon Rush’s season is over after two games.

The Golden State Warriors announced Saturday that an MRI exam on the team’s top reserve revealed a torn anterior cruciate ligament in Rush’s left knee. He will have season-ending surgery in the coming days. The typical rehabilitation time is at least nine months.

“He’s not doing great. He’s devastated as you can imagine,” said Rush’s agent, Mark Bartelstein. “It’s a traumatic thing to go through for anybody. We’re going to figure it out and work with the Warriors and come up with a great plan to get him back. But for the moment, it’s devastating with surgery and rehab ahead of you.”

All the good vibes entering Golden State’s home opener fizzled in an instant.

Rush leaped in the air for a dunk when Zach Randolph fouled him from behind with 4:09 left in the first quarter of the Warriors’ 104-94 loss to Memphis on Friday night. Rush landed awkwardly, and his knee bent badly as he tumbled to the court.