[1] Chaffey became an incomplete paraplegic when, as a non-disabled triathlete training for an Ironman Triathlon, he was hit by a truck while on his bicycle.

[5] In January 2013, Chaffey won the inaugural Australian Paratriathlon Championships, beating Ironman and Paralympian John Maclean and Paralympic rower Erik Horrie.

[16] Chaffey was forced to withdraw from the 2014 ITU World Triathlon Series Final in Edmonton, Alberta, Canada after breaking his hip in a training accident at home just prior to the event.

[17] In January 2015, he returned from injury to win the Oceania Paratriathlon Championships PT1 event at Penrith, New South Wales.

[23] In his final major international event, at the 2018 World Championships, Gold Coast, Queensland, he finished sixth in the Men's PTWC.