[3] In 2018, he played in a Sussex pre-season tour with the senior squad in Cape Town, South Africa.

[10][11] Carson made his first-class debut on 1 August 2020, for Sussex in the 2020 Bob Willis Trophy.

[13] Carson took his first five-wicket haul in a Bob Willis Trophy match against Surrey at The Oval.

[3] After Sussex's 2021 County Championship match against Yorkshire, Carson was compared to England off-spinner Dom Bess.

[4] Carson had taken a five-wicket haul in the match, including the wicket of England captain Joe Root.