His strikeout rate in Triple-A was 11.5 over nine innings, which is why the Braves wanted him in the first place. He throws really hard. He's big -- 6-foot-5, 255 pounds -- and has big-time stuff. (Serious curve,OK change-up.) He's left-handed, which is always nice. If he can command his pitches, he has upper-half-of-the-rotation promise.
At this point, the Braves' big-league rotation is open to all comers. Jaime Garcia has been the best of the five, which makes him most apt to be traded. (The hope that Bartolo Colon and R.A. Dickey would be bait for some contender hasn't materialized.) Julio Teheran's walk rate is the highest it has been since he became an established major-leaguer; his strikeout rate is the lowest. His WHIP last season was 1.053; this year it's 1.515. His case for being indispensable is fraying.
The Braves have hitched their organizational wagon to young pitching, and they could really stand to see a young pitcher find a place in this rotation. It might be too soon for Newcomb to stake a lasting claim -- Matt Wisler couldn't; Aaron Blair couldn't -- but Newcomb is a bigger prospect than those two. It will intriguing to see what he can do.
Further reading: It's about time for the Braves to trust their process.