Right-hander and top pitching prospect Jameson Taillon will undergo Tommy John surgery, the Pirates announced. He dealt with an elbow problem in camp.
Taillon, 22, was ranked the 10th best pitching prospect and 22nd best prospect in the game overall by Baseball America earlier this spring. The Pirates selected him with the second overall pick in the 2010 draft.
In 25 starts (and one relief appearance) and 147 1/3 innings last year, Taillon had a 3.73 ERA with 8.7 K/9 and 3.2 BB/9. He was slated to start the season in Triple-A and was expected to make his MLB debut at some point this summer.
Even with Taillon out, the Pirates still have Stolmy Pimentel, Vance Worley and Brandon Cumpton serving as extra rotation options.