I've written a lot lately about unheralded sleeper pitching success stories: Chase Anderson with the Diamondbacks,for example, along with Matt Shoemaker of the Angels and Collin McHugh of the Astros. If you are looking for someone who could fit into that category in 2015, consider Cody Martin of the Atlanta Braves.
He had an excellent outing last night for Triple-A Gwinnett, going 7.2 innings, allowing seven hits and one run, walking nobody and fanning six. This was a good rebound coming off his previous start, a rough outing on July 11th that saw him show uncharacteristic wildness, walking six and give up six runs in five innings. Overall this year, he has a 3.37 ERA in 115 innings, with a 99/38 K/BB and 116 hits allowed.
A seventh round pick in 2011 out of Gonzaga, Martin has put together solid numbers at each level: 2.93 ERA with a 123/34 K/BB in 107 innings in High-A in 2012, followed by a 3.16 ERA with a 137/58 K/BB in 137 innings between Double-A and Triple-A in 2013.
Martin relieved in college, but in pro ball he's developed into a four-pitch starter, working with an 89-93 MPH fastball and a decent curve and changeup. The slider is his out-pitch, and all four offerings play up when he has his command in gear. He's held up well to a starter's workload despite his relief background, and his mound presence is considered strong.
His command isn't perfect and could use a bit more consistency, but when he's right, Martin fits the sleeper profile similar to Anderson, Shoemaker, and McHugh: minor league inning-eaters who can surprise in the majors under the right circumstances. He's worth keeping a close eye on.