Feb 24, 2010 5:25 PM EST

Athletics pitcher Justin Duchscherer threw 20 pitches in a bullpen session before feeling the pain in his lower back and hip.

"I have been through this so many times I don't panic anymore," Duchscherer said Wednesday. "I just go talk to the trainers and doctors and get their opinion."

This time it led to a medical procedure Tuesday to relieve discomfort in his lower back.

"I needed quite a bit of sedation," Duchscherer said. "They couldn't get me under enough Monday, that's why I had to wait until yesterday. They gave me some and it didn't work, so they gave me more and then I woke up and we were done."

Via ESPN