Blair was born on 3 February 1992 in Horsham, Victoria.[3][4] In 2004 at the age of the twelve, he broke his back, wrist and suffered a collapsed lung after an accident on a utility vehicle. He went into a coma for a week. As of 2012[update] he lives in Horsham in Victoria.[3] By 2005, he was playing a variety of sports including wheelchair basketball, track racing and hand-cycling.[3] As of 2012[update], he attended the University of Missouri on partial scholarship for wheelchair basketball,[3][5][6] but was taking time off to concentrate on basketball.[7]
Blair first played wheelchair basketball in 2005, and attended a Ballarat, Victoria hosted APC Paralympic Talent Search in 2006. At the event, they encouraged him to continue in the sport.[3]
Blair played in the National Wheelchair Basketball League (NWBL) in 2009, finishing the season by being named to the All-Star 5.[4] As of 2012[update], he plays for the Dandenong Rangers in the NWBL, and joined for and was playing for University of Missouri team in the United States National Wheelchair Basketball Association (NWBA) as of 2012.[3][9] In late 2012, Blair was presented with offers several offers from American universities, including the University of Missouri, Columbia, and the University of Alabama, Tuscaloosa. After much consideration, Blair chose to take up a scholarship from the University of Alabama. He will dress for them in the Spring season of 2013.
Blair made his national team debut in 2009 at the Asia Oceania Wheelchair Basketball Championships where he averaged 0.3 points per game.[3][4] Later that year, he competed in the Rollers World Challenge,[3] and the IWBF U23 World Championship where his team finished fourth.[4] At the 2011 Wheelchair Tri Series where he played in games against South Africa and the Netherlands,[7] he averaged 0.8 points per game.[4] In August of that year, he also competed in the International Tournament of Champions.[7] In October 2011, he participated in a national team training camp in Canberra.[7] He was selected to represent Australia at the 2012 Summer Paralympics in wheelchair basketball.[3][10][11] The Games were his first.[10] Going into the London Paralympics, his team was ranked number one in the world.[12] He had to earn his spot as fourteen men had been vying for spots on the team.[13]
^Mccullagh, Justine (12 January 2011). "Jannik rolls into college life". Wimmera Mail Times. Archived from the original on 25 February 2011. Retrieved 29 July 2012.