[3][4] He attended Moor Park Prep, Dean Close School and Cardiff Metropolitan University where he represented the first team.
Pearson played 42 times for the university across both the local Welsh league and the BUCS Super Rugby competition.
[5] He made his senior club debut away to Exeter Chiefs on 23 October 2021 and was named Player of the Match in an Irish win.
[11] In June 2023 London Irish encountered financial issues and it was announced that Pearson would join Northampton Saints for the 2023–24 season.
[11] Later that month he was selected by England coach Steve Borthwick for a training camp preparing for the 2023 Rugby World Cup.