A first-round Draft pick in 2011, Stephenson has not allowed a run in his past two starts (14 total innings), over which time he's surrendered just five hits.
He's been solid since he was promoted from Double-A Pensacola earlier this month, notching a 4-0 record in five opportunities. He's 8-7 overall this year, topping his previous career-best mark of seven victories, which he reached in 2013 and 2014.
Alex M. Smith is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.