Brandon McCarthy remains in a "life-threatening" situation at a Bay Area hospital two days after being hit in the head by a line drive.

McCarthy suffered an epidural hemorrhage, brain contusion and skull fracture when he was hit on the right side of his head by a hard shot from Erick Aybar of the Angels.

He had two hours of surgery to relieve pressure on his brain late Wednesday night.

"Absolutely he is. It's brain surgery," A's athletic trainer Nick Paparesta said when asked if McCarthy's life was in jeopardy. "It's life-threatening. At any possible moment, something could go wrong. He could have a complication. Absolutely."