Hess (undisclosed) was reinstated from the 7-day injured list and pitched 1.1 innings, allowing one run on three hits while striking out one batter with Double-A Somerset on Thursday, Matt Kardos of Double-A Somerset's official site reports.
Hess made his return to action after missing nearly a month with an unspecified injury. The right-hander is considered to be one of the Yankees' top overall prospects, and he'll look to get on a roll with Somerset moving forward.