Triple-A Norfolk Tides relief pitcher Dennis Sarfate entered today's game against the Charlotte Knights at Harbor Park in the top of the eighth inning, but he suffered a minor oblique strain while warming up, according to Tides media relations director Ian Locke.
Norfolk manager Gary Allenson described the right-hander as day-to-day.
Sarfate was replaced by Ross Wolf, who tossed two innings to complete the Tides' 9-0 win over Charlotte.
Norfolk starting pitcher Jake Arrieta gave up three hits in seven scoreless innings for his first win of the season. The 24-year-old right-hander threw 56 of his 79 pitches for strikes.
In two appearances before today, Sarfate allowed one hit in three scoreless innings.