Oliver Charles Mathis is a New Zealand professional rugby union player. He plays for Crusaders and previously featured for Waikato in the National Provincial Championship and the New Zealand national rugby union sevens team.
He displayed versatility in his debut season playing for Waikato in the National Provincial Championship in 2024, making three starting appearances at flanker and two on the wing, and scored five tries in his five starts and seven total appearances. He scored a try in the semi final of the NPC in 2024 as his team bowed out to Wellington. Ahead of the 2026 season, he signed for Super Rugby side Crusaders. ==International career==