Command-and-control righty. I’m not quite sure what’s going on with Martinez’s first name, or why he wasn’t signed (out of the Dominican by the Tigers) until he was 20. A late growth spurt, maybe? After a bit of rough introduction to the minor leagues in 2003, he pitched well in 2004. He was evidently hurt in 2005, pitching in only three games. (In fact, he either has been battling injuries or babied throughout his career; until a couple of years ago his number of starts per year was very limited.) He put up a 2.56 ERA in 2006, but as a 24-year-old pitching at the lowest levels, it’s not that impressive.
The Marlins took him from the Tigers in the minor league draft after that season, and he was mediocre in A-ball for the next couple of years. He finally had a good year in the higher levels in 2009, going 9-3 with a 2.94 ERA in AA, and earned a callup to the big club. Martinez had been pretty exclusively a starter in the minors, but the Marlins used him out of the pen, where in 15 games he put up a 5.13 ERA. His tendency was to give up runs in bunches, allowing four runs twice and three runs on another occasion, meaning that almost three-quarters of the 16 runs he allowed came in just three appearances.
The Braves took him off waivers from the Marlins in spring training. Following their lead, they made him a full-time reliever. His ERA in 12 appearances in Gwinnett is 5.04, even though his components (7.9 K/9, 1.4 BB/9, one hit an inning) are actually pretty good. He’s still basically fodder, a secondary long reliever.