Blair played for the Sydney Roosters in the National Youth Competition after being selected for the Australian Schoolboys. Blair made the Roosters first grade 25-man squad, but did not play. Blair signed with the Parramatta Eels late 2011 hoping for first grade spot.
Parramatta Eels (2012–13)
Blair moved to Parramatta for the 2012 NRL season and made his NRL debut in round 1 2012, against the Brisbane Broncos at Parramatta Stadium. He scored his first try the next game against the New Zealand Warriors in round 2. Blair made 22 appearances in his first year at Parramatta as the club finished last on the tablefor the first time since 1972. In June 2013, Blair was one of 12 Parramatta players that were told that their futures at the club were uncertain by coach, Ricky Stuart. Blair was limited to only six appearances for Parramatta in the 2013 NRL season as the club finished last for a second consecutive year.
Blair signed with 2013 NRL Grand Finalist Manly-Warringah for the 2014 NRL season. After starting the season playing on the wing, Blair spent much of the season playing for Manly's NSW Cup team due to the form of Peta Hiku and the return from injury of Jorge Taufua. He played 9 first grade games for Manly in 2014, including being selected on the wing in Manly's controversial 18-17 golden point extra time loss to Canterbury Bankstown in the Semi finals. He was contracted to the Sea Eagles until the end of the 2015 NRL season.
Melbourne Storm (2016–2019)
On 8 October 2015, Blair signed a one-year contract with the Melbourne Storm starting in 2016. He played in the 2016 NRL Grand Final against Cronulla Sharks. On 13 July 2017 Blair was ruled out for the rest of the NRL season with an ankle injury and missed out on being a part of Melbourne's 2017 premiership winning team.
Castleford Tigers (2019–present)
On 12 April 2019 it was announced that Blair had signed a three-and-a-half-year deal with Super League club Castleford Tigers after being allowed to exit his contract early with Melbourne Storm. Castleford Director of Rugby Jon Wells described Blair's signing as "a huge statement of intent for the Tigers". He was assigned squad number 35. Blair joined a Castleford side in the midst of an injury crisis and was "thrown in at the deep end and started playing straight away". He later recalled: "I was still finding my feet and I didn’t play my best footy or settle in as quick as I wanted to." Blair made 18 appearances, all as a centre, and scored 2 tries in his first season with the Tigers. Blair was given the number 18 ahead of the 2020 season. He had a brilliant start to the year, surpassing his maiden season's try tally in just the fourth round with a score against local rivals Wakefield Trinity. Blair alternated between second-row and centre during this time.
Representative career
Blair has represented the NSW and Australian Schoolboys teams.
