"For the past week, Kevin Youkilis [stats]hoped the stiffness in his lower back would subside with rest. But with the pain still persisting after Wednesday's game at Fenway Park [map], the Red Sox [team stats] sent him to be examined.

Sure enough, Youkilis has landed on the disabled list with a back strain.

The move, made before last night's 4-3 win against the Royals, resulted in the call-up of prized catching prospect Ryan Lavarnway, who was the Red Sox' designated hitter in the opener of the four-game series at Kauffman Stadium.

Youkilis, meanwhile, stayed in Boston and got a cortisone injection that is designed to aid in the healing process. The Red Sox are hopeful the All-Star third baseman won't miss more than 15 days.

"His body was so beat up anyway, I think this was like the last straw. Kind of put him over the edge," manager Terry Francona said. "Hopefully we can get him back and get him back feeling like where he can be Youkilis.""