In hockey, Sullivan won the 1993 Burney Cup, beating Banbridge Academy after sudden death penalty strokes. In 2006 they reached the final again, losing 4–2. Former team members include Irish senior international player Mark Raphael. In 2009 they also reached the McCullough Cup final for the first time in the school's history. In 2010, the team reached the semi-final of the Burney Cup but lost to Campbell College. In 2017 the school beat Wallace High School 3–2 in the Burnley cup final, the schools first victory since 1993. The school won the McCullough cup the following year beating friends after a late equaliser from Matthew Willis brought the game to a 2–2 draw with Fergus Gibson scoring the decisive penalty. The school also managed to reach the Burney Cup final this year but Friends avenged their earlier defeat, with the game again going to penalties. In 2019 Sullivan reached the Burnley cup final for the third year in a row but narrowly lost out to Wallace on penalty runs