Texas Rangers pitching prospect Kumar Rocker has a torn ligament in his right elbow and will need Tommy John surgery.

Rocker was a top-10 pick in each of the last two Major League drafts.

Texas general manager Chris Young said that Rocker had an MRI after his start last week at Single-A Hickory. The surgery probably will be later this week.

Rocker was the third overall pick by the Rangers last summer, when the right-hander was drafted again a year after concerns over a physical led to the former Vanderbilt star going unsigned by the New York Mets as the 10th overall pick.