UPDATE: The Yankees have officially placed Kevin Youkilis on the DL, the team announced. Corban Joseph was called up to fill the roster spot.
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Youkilis, 34, underwent an MRI on Monday that showed no structural damage. He will receive an epidural, however. Youkilis returned to the lineup on Saturday after missing six games, but he hasn't played since. The Yankees will only be able to back-date the DL stint to Saturday, the last game he played.
CBSSports.com's Danny Knobler hears the Yankees have been looking for a right-handed bat in the wake of Youkilis' injury. They're hitting .214/.289/.337 as a team against left-handed pitchers, and their only notable right-handed bat at the moment is the surprisingly productive Vernon Wells.
Signed to a one-year contract to replace the injured Alex Rodriguez this offseason, Youkilis was hitting .279/.353/.443 with two homers in 69 plate appearances at the time of the original back injury. He went 0 for 3 with a walk and a strikeout in Saturday's game.
Without Youkilis, the Yankees have been using utility man Jayson Nix at third base. Triple-A infield prospects Corban Joseph (.273/.347/.477 this year) and David Adams (.327/.417/.462) could get the call to fill the vacated roster spot. Neither has ever played in the big leagues.
If placed on the DL, Youkilis will join a lengthy list of injured Yankees that includes A-Rod (hip), Derek Jeter (ankle), Curtis Granderson (forearm), Mark Teixeira (wrist), Francisco Cervelli (hand), Michael Pineda (shoulder) and Ivan Nova (triceps).