- Adam Rubin, ESPN Staff Writer
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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).