Afamasaga originally began playing Rugby union in his youth, playing for the 1st XV team at Waiopehu College in Levin (the same high school attended by former All Black Carlos Spencer) and working his way up through several representative teams before he was eventually selected by the Wellington Hurricanes in their schoolboy team
He also spent time playing with the,, Cronulla Sharks and more recently the in the National Rugby League, with stints in the local Queensland Cup and in France. His main position is second row. He is eligible to represent Samoa.
In 2002, at age 18, and after several seasons in the Hurricanes" youth system playing in the centres Afamasaga was spotted by rugby league scout Mark Horo and was signed to the Australian club on a development deal.
He began playing in the junior grades at the Parramatta club during the 2003 season, impressing with his skill, power and pace. Afamasago made his first grade debut during the 2004 season against the Wests Tigers at Leichhardt Oval.
During the next two seasons with the club, Afamasaga played another six games but could not hold down a permanent first-grade position. Afamasaga was offered a new deal at the Eels at the completion of the 2006 NRL season but signed for the instead, deciding to chase a regular first grade spot.
He appeared in the 2007 Grand Final, which Manly lost to Melbourne.
However, after failing to crack a regular first-grade spot in 2008 (only playing 2 matches) he has now been released by Manly. Afamasaga was signed to a trial deal with the for the rest of the 2011 season. Signed before the 30 June deadline, Afamasaga is now free to play with the Victorian side and their feeder team on the Cronulla Sharks.
He had recently been playing in France for Racing Club Lescure-Arthès XIII and played in the Queensland Cup for the Wynnum Manly Seagulls in 2010.
After his stint with Storm, Afamasaga moved to Newcastle, New South Wales to play with the Western Suburbs Rosellas for the 2012 season. In 2009 he was named as part of the Samoan side for the Pacific Cup.
