Zack McAllister has announced his retirement from competitive swimming.

Zack McAllister, who was born and raised in Lethbridge, Alta., has a genetic condition that results in bone spurs and tumours, that restrict growth and the range of motion in his arms and legs.

McAllister made his first  Paralympic Team in 2012 where he represented Canada at the London Games and competed in four events. His best finishes were sixth in the 400-m free and 10th in the 100 free, setting Canadian and Americas records in both races.

He would continue setting records as he lowered the Canadian and Americas records in the 50-m and 100-m freestyle at the 2013 IPC World Championships in Montreal. At the Toronto 2015 Parapan American Games, he won gold in the 50-m freestyle, breaking his own Canadian record and setting an Americas record. He also added a silver in the 400-m freestyle and the 100-m freestyle and was part of the 4×100-m 34 pt. freestyle relay team that won silver and set a Canadian record.

He qualified for the Rio 2016 Games, his second Paralympic experience. McAllister made the finals in both the 100-m and 50-m freestyle and he finished seventh and eighth respectively, while also contributing to a Canadian record in the 34pts 4×100-m medley relay.

In 2012 McAllister was a recipient of the Queen’s Diamond Jubilee Medal, one of Canada’s highest honours that recognizes significant achievements by Canadians.

McAllister's illustrious career has also seen him named the Swim Alberta Para Swimmer of the Year - Male on five separate occasions, 2008-2009 - 2011-2012, 2012-2013, 2014-2015, and 2015-2016.

Swim Alberta wishes Zack all the best in his future endeavours.

McAllister competing at the 2012 Paralympics in London, England McAllister preparing to race at the 2015 Para Pan Ams in Toronto, ON