Mateo ATLANTA -- Pitching prospect Luis Mateo underwent Tommy John surgery last week.

Mateo, a 23-year-old right-hander, made a combined four early season appearances with Class A St. Lucie and Double-A Binghamton before being shut down with elbow inflammation.

Since his pro debut in 2011, he is 11-8 with a 2.55 ERA in 29 appearances (27 starts).