You overwhelmingly chose Shawn Armstrong for the 16th spot in our community rankings.
The Indians selected Armstrong in the 18th round of the 2011 draft (which already is looking like an outstanding draft, with Cody Allen, Francisco Lindor, and Cody Anderson having already made meaningful contributions). Armstrong has taken longer to get to the majors than you'd expect for a college pitcher, having struggled for a couple of years at the AA level. His stuff has never been in doubt, but he's struggled to find the strike zone at times. That wildness may come with the territory, though, as everything he throws has movement on it. His two-pitch mix of mid-90s fastball and low-90s slider was extremely effective both at AAA and the majors in 2015; he struck out 91 batters in 59.2 innings between Columbus and Cleveland.
As mentioned above, Armstrong made his major-league debut last year, and should play a key role with the team this year. He may get very used to I-71, traveling between Cleveland and Columbus as a temporary fill-in, but I think he'll earn a permanent spot on the team by the end of the year, much like Austin Adams did in 2015.