Freddie was one of the youngest members of the Samoan Rugby team that beat Wales at Cardiff Arms Park in the 1991 Rugby World Cup. He also went on to play in the 1995 Rugby World Cup in South Africa.
At the end of 1995 he switched code to rugby league and played for Halifax until 1998 when he joined St Helens and went on to win two Super League Championships.
In 2000 Freddie switched back to Union and signed with Leicester Tigers and was part of the team that won five premierships titles and two European Heineken Cups. Whilst with Tigers Freddie brought five of his brothers over from Samoa, Henry, Alesana, Andy, Vavae and Manusamoa, all of whom have gone on to play for Leicester Tigers.
Freddie retired from playing professional rugby in 2007 after short spells with Cardiff Blues and Castres in France.
In 2008 Freddie became the technical adviser for Rugby League Samoa at the Rugby League World Cup in Australia.
In 2009 he became director of rugby for the national team. In 2010 Freddie set up Tuilagi Rugby Skills with the aim of developing future rugby stars from grass roots level by giving them the best opportunites and world class coaching.