MLB.com's Bryan Hoch has more details on Chien-Ming Wang's injury.

The Yankees placed Chien-Ming Wang on the 15-day disabled list on Friday after the struggling right-hander was diagnosed with weakness in the adductor muscles of both hips. ...

The weakness is a kinetic effect of Wang's right foot injury -- a Lisfranc fracture suffered last June 15 -- and may be directly responsible for the 34.50 ERA Wang posted in three big league starts this year.

Brian Cashman says that he'll have 7-10 days of physical therapy, but it is unclear when he might be back with the Yankees.