Fielding came through the Doncaster Rovers youth team to sign a two-year scholarship contract in May 2015.[2] He then went on to sign an 18-month professional contract after regular training with the first team squad in 2016. He made his first-team debut at 17 years of age in a 2–0 win over Mansfield Town in an EFL Trophy group stage game at Field Mill on 30 August 2016.[3] He then went on to make 2 more appearances for Darren Fergusons squad in the same trophy against Derby County and Sunderland while featuring in many match day squads in the league campaign.