Career
Sarjeant took up speedway at the age of nine on 80cc bikes, progressing to 500cc bikes by the age of eleven, and was the Sheffield Tigers mascot as a child. He signed as a Coventry Bees asset in 2009 and the same season made his National League debut for Scunthorpe Saints. He signed for Dudley Heathens in 2010, but lost his place mid-season to Micky Dyer.
He subsequently joined Bournemouth Buccaneers but injury restricted him to four appearances for the team
In 2011 he joined Stoke Potters and by the end of the season his Greensheet Average had risen to 6.30. He made his debut for the Great Britain Under-21 side that year against the United States.
He rode for Rye House Raiders in 2012, finishing the season as the team"s second highest averaged rider (behind Jason Garrity) on 7.87. He was picked by Elite League Coventry Bees in the reserve draft for their 2014 team and continued with Coventry Storm as team captain in the National League.