- Bats Right, Throws Right
- Height 6' 2", Weight 205 lb.
Mark Castellitto hit .472 with 46 RBI as a high school senior. He redshirted in 2006 as a freshman in college, then hit .236 in 2007. The next year, he improved to .315. His junior year, he fell to .278 but tied for fifth in the West Coast Conference with nine home runs. He was All-Conference as a senior in 2010, hitting .335 with 11 HR and 50 RBI. He tied for 7th in Gonzaga history with 29 home runs. Castellitto signed with Bologna in the Italian Baseball League for 2011. In the 2011 European Cup's Amsterdam phase, he was 8 for 22 with a double, triple, two walks, four runs and 7 RBI. He tied Edgard Clemente and Roeland Henrique for second in RBI, one behind Joe Mazzuca and tied William Domero for fifth in total bases.