At the 2008 Summer Olympics, he was a member of the Canadian team that finished sixth in the 4x100m Freestyle event. The team had previously finished in 7th at the 2007 World Aquatics Championships.
As of 2008, Greenshields lives in Tucson, Arizona.
- http://www.sports-reference.com/olympics/athletes/gr/joel-greenshields-1.html at Sports Reference
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