| Justin Duff | |
| Fullname: | Justin William Duff |
| Nickname: | Duffman |
| Birth Date: | May 10, 1988 |
| Birth Place: | Winnipeg, Manitoba, Canada |
| Position: | Middle blocker |
| Weight: | 102kg (225lb) |
| Spike: | 367cm (144inches) |
| Block: | 336cm (132inches) |
| College: | University of Winnipeg |
| Updated: | 13 June 2017 |
| Years: | 2006–2010 2010–2011 2011–2013 2013 2014 2014–2015 2015–2016 2016–2017 2017–2018 2018–2019 |
| Clubs: | Winnipeg Wesmen Aon hotVolleys Vienna Arkas Izmir Belogorie Belgorod Yakarta Energy Transfer Bydgoszcz Benfica Lisbon Olympiacos Piraeus Espadon Szczecin Galatasaray S.K. |
| Nationalyears: | 2011–2019 |
Justin Duff (born 10 May 1988) is a former Canadian professional volleyball player. He was a member of Canada men's national volleyball team, a bronze medalist of NORCECA Championship (2011, 2013).
In July 2016, he was named to Canada's 2016 Olympic team.[1]
In 2014 he signed a contract with Transfer Bydgoszcz.[2] After one season in Portuguese club Benfica Lisbon and one season in Greek Olympiacos Piraeus, he decided to come back to Poland and join Espadon Szczecin team.