In September 2020 Chapman was named as an injury replacement in the Tasman Mako squad for the 2020 Mitre 10 Cup.[2] He made his debut for Tasman in Round 2 against Northland at Lansdowne Park in Blenheim. He played 5 games for the Mako in the 2020 season as they went on to win their second premiership title in a row. Chapman had an outstanding 2021 Bunnings NPC as Tasman made the premiership final before losing 23–20 to Waikato. Chapman made his debut for the Crusaders in Round 15 of the 2023 Super Rugby Pacific season starting 70 minutes in a 26-27 loss to the Hurricanes.
References
^"Louie Chapman". mako.nz. 26 September 2020. Retrieved 26 September 2020.