Honorable mention All-American in the 50-yard freestyle, 200-freestyle relay, 200-yard medley relay, 400-yard medley relay and 400-yard freestyle relay (2013).

At the SSC championships, came in second in the 50-yard freestyle with a time of 20.40 (2013).

Representing his home country of Grenada at the 2012 London Olympics, Simpson posted a time of 53.26 in the 100-meter freestyle to win the second heat.

Honored as an All-American in the 400-free relay, the 200-free relay and 200-medley relay (2012).