Peni moved to Perth, Australia at a young age, playing rugby union for Wests Subiaco before moving to Newcastle, New South Wales and playing for the Western Suburbs Rosellas before being signed by the Newcastle Knights.
Peni moved to Perth, Australia at a young age, playing rugby union for Wests Subiaco and playing for Willagee Bears in the Western Australian Rugby League. He then moved to Newcastle, New South Wales and playing for the Western Suburbs Rosellas before being signed by the Newcastle Knights.