Withrow, a 19-year-old right-hander out of Midland (Tex.) Christian High School, was the 19th overall pick last year and signed for a $1.35 million bonus. He was limited to only nine innings in six professional games after being drafted because of concerns with his elbow.
This June, Withrow was close to being assigned to a Minor League roster, but suffered another setback. He continued throwing at Class A Inland Empire under the coaching of Charlie Hough.
After a series of injuries sidetracked the careers of first-round pitchers Greg Miller and Scott Elbert, the club was extra cautious bringing back Withrow. Miller continues his comeback at Triple-A, while Elbert is throwing hard again at Double-A and could earn a September big league callup.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.