Athletics St. Joseph's Prep's athletic teams compete as one of the 16 schools in the
Philadelphia Catholic League. The Prep joined the
Pennsylvania Interscholastic Athletic Association in the 2007–2008 school year. The Prep offers the following athletic programs:
Fall: cross country, football (varsity, junior varsity, and freshmen),
crew (varsity and junior varsity), rugby, soccer (varsity, junior varsity, and freshmen), squash (varsity and junior varsity), Ultimate Frisbee (club), and golf.
Winter: basketball (varsity, junior varsity, and freshmen), bowling (varsity and junior varsity), indoor track and field, swimming, wrestling (varsity and junior varsity), and ice hockey (varsity, junior varsity, and freshmen).
Spring: baseball (varsity, junior varsity, and freshmen),
crew (varsity, junior varsity, and freshmen), volleyball, lacrosse, outdoor track and field, tennis, mountain biking, Ultimate Frisbee (club), and rugby (varsity, junior varsity, freshmen/sophomore). The boys senior eight crew team has won the
Stotesbury Cup in national competition 16 times; in 1955, 1987, 1992, 1995, 1997, 1999–2001, 2005, 2008, 2010, 2019, 2021, 2023, 2024, and 2025. Additionally, the Prep is the only team to ever sweep all the boys' eights events at the Stotesbury Cup Regatta, having done it in 1997, 2008, 2023, 2024 and 2025. In 2000, the Prep Varsity 8 won the
Princess Elizabeth Challenge Cup at the
Henley Royal Regatta. In 2021, St. Joseph's Prep won the
USRowing Youth National Championship in the Men's 8+ for the first time. This was the first time a scholastic team won the national championship in over a decade. Subsequently, the Prep varsity 8 earned a silver medal at Youth Nationals in 2024. Additionally, in 2025, St. Joseph's Prep won the Under-17 8+ at the
USRowing Youth National Championship. The Prep football team won back-to-back state championships, winning the Class 4A state championship in 2014 with a 49–41 win against
Pine-Richland High School in the finals. Despite losing to La Salle College High School early in the 2015 playoffs, the St. Joseph's Prep football team won the first-ever Class 6A PIAA state championship, defeating
Pittsburgh Central Catholic by a score of 42–7 at HersheyPark Stadium in Hershey, Pennsylvania. The team won the program's fourth state title in 2018 with a 40–20 win against
Harrisburg High School in the Class 6A tournament final. ==Notable alumni==