The school has one of the top ice hockey programs in the United States, dating to its founding in 1941. The school regularly produces picks in the NHL Entry Draft. In June 2003, the school was tied for the most first round picks from a single high school, ever, at four. St. Sebastian's now has five first round picks after Noah Hanifin was chosen fifth overall in 2015. The team is coached by Sean McCann, a former Harvard assistant coach and captain, and also a Hobey Baker finalist.