The 21-year-old righty, who came to San Diego from Boston in December's Adrian Gonzalez deal and was named MLB.com's No. 22 top prospect, earned the win in San Antonio's 5-2 victory over Corpus Christi on Monday. He permitted one run on two hits and two walks while fanning three over six innings.
Kelly ran into trouble early, issuing a leadoff walk to the Hooks' James Van Ostrand in the second inning. Van Ostrand advanced on a groundout and scored when Jon Gaston slapped Kelly's 1-0 pitch back up the middle for a single. With his very next delivery, though, Kelly got out of the inning, inducing a double-play ball to shortstop off the bat of David Flores.
The hurler allowed only a hit batter over his next two innings, and he paid no mind to a one-out walk and a line-drive single in the fifth. A sacrifice bunt got him the second out of that frame, and he got the next hitter to bounce out to third.
The sixth posed no threat at all, and Kelly picked up his 25th strikeout of 2011.
Kelly improved to 3-0 with the win, and he's allowed a total of four runs over his most recent 18 innings, also allowing only four walks in that span.
Teammate Jaff Decker, one of the Padres' top hitting prospects, was 2-for-4, and Brad Brach picked up his league-leading ninth save.