Pearson had been a member of the
Gloucester academy but was released as a teenager. He signed for
London Irish on 21 June 2021. On 8 February 2022 Pearson was called up by coach
Eddie Jones to train with during the
2022 Six Nations Championship. Pearson scored his first try for Irish as they beat
Bristol Bears on 11 February 2022. In the 2022–23 season Pearson was named as both
Premiership Rugby's
Breakthrough player of the year and as the
Rugby Players' Association's young player of the season. In June 2023 London Irish encountered financial issues and it was announced that Pearson would join
Northampton Saints for the 2023–24 season. On 5 August Pearson made his
Test debut starting in a warm-up defeat against
Wales. So far he has been a solid player for the Saints and has made his mark on the 2023-24 season. == Personal life ==