Mar 11, 2008 5:17 PM EST

MRI results were negative on the back of Josh Beckett, but the Boston starting pitcher is still in pain, according to ESPN.com.

He will not throw the baseball until the pain has disappeared.

"We're going to make sure it's completely pain-free," he said Monday. "I can't even, really, if lying in one position too long, or sitting in one position too long or standing in one position too long, it kind of goes backwards. I've got to keep moving and stuff like that."

Via ESPN