Joe Clarke wrestled for Westminster Schools where he won three state titles and posted a record of 189-12. At the 1999 National High School Wrestling Championships, Clarke placed second. He was named the Most Outstanding Wrestler after winning the 1999 National Prep School Championship. Clarke was runner-up in 1998 and third in 1997 at the same tournament. Clarke also served as co-captain of his lacrosse team and was a member of the football squad. Clarke was a member of National Honor Society after garnering a 3.7 GPA. He was named an AP Scholar with Honor and NHSCA Academic All-American. Clarke was also a member of his school's Honor Council Prefect, which upholds the school's honor code. In addition, Clarke was involved in theater, Latin Club and Habitat for Humanity.