Red Sox pitcher Josh Beckett has been given medical clearance to resume physical activity Wednesday after suffering a mild concussion earlier this week. However, he was scratched from his next scheduled start Thursday as a precaution. Beckett was hit in the head by a baseball on Monday and was held back from doing anything physical on Tuesday. "He passed his test, which means he's allowed to do some activity," Red Sox manager Terry Francona said. "Now, they have to monitor his activity. He'll do some biking and some light throwing and see how he progresses from there."