To date Crisp has won twelve Paralympic medals. Seven of the medals were awarded at the 2000 Summer Paralympics including individual golds in the 100 m backstroke and the 200 m individual medley. He was also part of the victorious 4x100 m freestyle relay team alongside Jody Cundy, Giles Long, David Roberts, Matt Walker and Marc Woods. At the 2004 Games Crisp won four individual medals, including three silvers, with all four events being in different stroke styles.