Sapp made his international debut for the United States at the World Para Swimming Championships in 2017 where he won a gold medal in the 100 metre backstroke S14 event.

[2] Sapp represented the United States at the 2020 Summer Paralympics where he finished in fifth place in the 100 metre butterfly S14 event.

[4][5] On April 29, 2023, Sapp was named to the roster to represent the United States at the 2023 World Para Swimming Championships.

[6][7] On June 30, 2024, Sapp was named to team USA's roster to compete at the 2024 Summer Paralympics.

His experience led Maryland's Motor Vehicle Administration to change the test and make it more accessible for everyone.