Born in Suvai, Samoa, Lafai attended Redfern High School, graduating in 2009 while playing his junior football for the Minto Cobras and Campbelltown Warriors.
In 2007, Lafai played for the Western Suburbs Magpies' Harold Matthews team before being signed by the South Sydney Rabbitohs.
He played for the Rabbitohs' SG Ball team and also played for the Campbelltown Eagles in the Bundaberg Red Cup.
Tim Joined the Canterbury-Bansktown Bulldogs in 2010 on a one year contract and played in the Toyota cup side throughout 2010 and 2011 scoring 17 tries in 32 games. Lafai was Nicknamed “Turning Point” after turning the Bulldogs NYC teams from a one from six win to loss ratio to win 17 of the next 20 matches.
After losing Josh Morris to injury in the lead up to Round 2 of the 2011 season Tim was called up to the NRL side against old club the South Sydney Rabbitohs and scored his first try on debut.
Lafai was named on the bench in the 2011 Toyota Cup Team of the Year.
Tim appeared in the first five rounds of the 2012 NRL season scoring two more tries playing in his favoured centre position.
Tim managed to secure a more regular spot in the side in 2013, playing 16 games and crossing the try line 7 times as well as earning the players player award in round 8.
Away from the games the son of a Pastor practices his religion and recently proposed to his new Fiancé but has not set a date for the wedding just yet.
Tim was selected to represent Samoa at the Rugby League World Cup in 2013.
Tim will be back and fighting hard for a permanent spot in the Bulldogs centres in 2014.