Jon Prosinski is a right-handed pitcher for Seton Hall University. Prosinski finished the 2011 seasons with a 5-4 record and a 2.14 ERA. Pronsinski held batters to a .222 average, striking out 44 and walking 27.

During his first year with the Pirates, Prosinski was named to the NJCBA All-Rookie Team and the 2010 Big Ten/Big East Challenge All-Tournament team honorable mention. He got his first collegiate win throwing six scoreless innings against Northwestern allowing only four hits and striking out six batters.