Aitzol Arenzana-King joined Ulster Rugby in the summer of 2025, after coming through the Academy at Leinster Rugby. 

He is a physical back-three player with speed and a strong finishing ability. 

The back had previously worked alongside Ulster's coaching staff in the Ireland U20s set up, winning a Grand Slam back in 2022. 

The winger made his senior Ulster debut against Munster in the URC last season and scored a spectacular diving try in the corner. 

Aitzol goes into the 2026-27 season as a Development player in the senior squad and will be pushing for more minutes.