Alex Rodriguez underwent surgery on his hip Wednesday and, in addition to keeping the endless string of “successful” surgeries on athletes alive, the Yankees got some early good news on the nature of the injury itself. Via Anthony McCarron, Dr. Bryan Kelly informed the Yankees that there was less cartilage damage in the afflicted hip than expected, which is a good start to the rehab process for A-Rod. “That will mean his rehab has the highest chance of successfully getting back to the level with his hip that he was before his hip started hurting,” Dr. Derek Ochiai, an orthopedic surgeon from Virginia, said. Of course, just what that level is will be an issue all in itself, as Alex has been steadily declining since 2009, and was struggling to find his power stroke early in the 2012 season. But with fully half of that mammoth contract left on the books, any good news on A-Rod’s health will certainly be warmly received by the Yankees.