No punchline needed.

http://cbs.sportsline.com/mlb/story/9999764

MESA, Ariz. -- Oft-injured Kerry Wood is out again -- this time because of a flub in a hot tub.

The Chicago Cubs pitcher is not expected to throw off the mound for a few days after he slipped this week getting out of a hot tub at home. Wood landed on his stomach and chest.

"It was just a little spill," Wood said Thursday. "I didn't think anything of it. Nothing's wrong. It's just going to be a few extra days. My arm feels great. My body feels good."

Wood said he probably would not have thrown off the mound until Friday had he not gotten hurt. He participated in most drills on Thursday when pitchers and catchers worked out for the first time.

Bothered by an injured right shoulder the past three seasons, Wood is being converted to a reliever after being limited to four starts last year.