NEW YORK  - Kevin Youkilis is happy his back injury doesn't appear serious and thinks he could return to the Yankees' lineup as soon as his stint on the 15-day disabled list is up.

The infielder was back at the ballpark Wednesday, one day after being told to stay home and rest following an epidural injection. He says he should be able to resume baseball activities in about a week and hopes he's ready to go when he's eligible to come off the DL on May 13.

Youkilis joined Derek Jeter, Alex Rodriguez, Mark Teixeira and Curtis Granderson on New York's star-studded disabled list Tuesday because of a lumbar spine sprain. By playing Youkilis last weekend, the Yankees lost the chance to backdate the move to April 21 and could only make it retroactive to Sunday.

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