Colby Lewis' rehab delayed a week

OAKLAND, Calif. -- Rangers right-hander Colby Lewis received an anti-inflammatory injection to treat mild triceps tendinitis and had his rehab assignment suspended for a week, the team announced before Monday night's game.

Lewis underwent surgery in July on his pitching elbow to repair a torn flexor tendon, but this problem is not related, a team spokesperson said.

Rangers manager Ron Washington said the Rangers are just taking a cautious approach with Lewis.

"We still got that period before we have to do anything with him, that time," Washington said. "So be careful and make certain. That's all. Spring training stuff. But we still got this big window that he has to work in."

Lewis is expected to throw again this weekend in Arlington and make his next rehab start Monday or Tuesday.

Lewis worked two innings Thursday night for Triple-A Round Rock at Las Vegas but experienced some soreness in his right triceps following that appearance.