Jack Lewis penned his first professional contract at Northampton Saints ahead of the 2026/27 season, signing for his boyhood club after graduating their Academy system. 

The young back row debuted in Black, Green and Gold during the PREM Rugby Cup in 2026 to become Saint #2130 and marking himself as the Club’s second youngest player in the professional era – featuring at just 17 years and 240 days old. 

Lewis’ performances through the Cup earned him Saints’ Player of the Month award in February that season before he returned to action within Northampton’s Academy set-up – a system he was a part of since the age of 13. 

Alongside playing for Saints, Lewis – whose father, Mark, played 51 times for Northampton in the 90s – featured heavily for Northampton School for Boys during his studies there, captaining the side to the 2026 Schools Cup Final where his try helped them to victory at Allianz Stadium, Twickenham.