After leaving Jamaica's Glenmuir High, Griffiths played college soccer at the University of Rhode Island from 1998 to 1999, leading the team to the Atlantic-10 Conference regular season and tournament championships in 1999. He finished his career at URI with 42 points.
Professional
Nicknamed Fanna, he began his professional career with the Connecticut Wolves of the A-League. He returned to his native Jamaica to play for Galaxy FC, but his team was relegated from the Jamaican National Premier League. When the season ended he had an unsuccessful trial with Bolton Wanderers. In 2002, Griffiths was drafted by Dallas Burn of the Major League Soccer, but was traded to the MetroStars in exchange for D.J. Countess before the start of season. He made his debut on 23 March 2002 against New England Revolution. On 20 April 2002 he was traded to the Los Angeles Galaxy for a conditional SuperDraft pick, and appeared in six matches and recorded one goal. He was waived from the roster and on 30 July 2002 he was signed by the New England Revolution. For the remainder of the season he helped New England secure the Eastern Conference title. He featured in the MLS Cup final against his former club the LA Galaxy where he nearly scored the match winner at the 112' minute to only hit the crossbar and allow the Galaxy to recover and record the winning goal a minute later. The following season he returned to Jamaica to play with Portmore United, where he won the league title and the JFF Champions Cup. In 2004, he went abroad once more to return to the USL A-League to be signed by the Vancouver Whitecaps. Throughout his time in Vancouver he recorded two goals and five assists, and reached the Western Conference Finals. He returned home in 2005 to play with Arnett Gardens F.C., and returned to Canada on a loan to the Toronto Lynx. He made his debut on 30 April 2005 against Richmond Kickers. He recorded his first goal the following match in a 1–1 draw to the Virginia Beach Mariners. After appearing in four matches he was deemed as surplus and returned to Jamaica. In 2007, he had a third stint in Canada where he played with Portuguese Supra of the Canadian Soccer League. He made his debut for the club on 12 July 2007 in an Open Canada Cup match against the Canadian Lions. On 15 July 2007 he recorded a hat-trick in a 5–2 victory over the Lions. After a brief tenure with Supra he returned home to play in the South Central Confederation Super League with Sporting Central Academy, and secured a league title and promotion to the premier league. After a two-year absence from football he returned to the CSL in 2010 after London City signed him to a contract from a recommendation from former teammate Rick Titus. On 2 July 2010 he returned home in order to sort personal matters out. He finished off his career with Humble Lions F.C. in the premier league.
