Career
He competed at the 2004, 2008 and 2012 Summer Paralympics, and also represented Springfield College in the National Collegiate Athletic Association Men"s Swimming and Diving Championships. Zook was born missing half his right foot and with non-functioning growth plates in his right legal 30 operations lengthened his leg but caused nerve damage, muscle weakness and range of motion problems.
He started swimming as physical therapy at age 6.
As of February 2013, Zook holds IPC world records for 100m and 200m backstroke events.