 Vitarelli was signed by the Rochester Knighthawks in December 2010, while playing his final season of college hockey at the University of Prince Edward Island with the expectation that he would join the Knighthawks after his team's hockey season concluded.After an unexpected early exit from the playoffs by his college hockey team, Vitarelli made his NLL debut with the Knighthawks on March 26, 2011, scoring 2 goals and assisting on another.He followed that up in his second game a week later with a hat trick.