Career
He joined Colchester from the Tottenham Hotspur youth system, having failed to break into the Spurs first team He currently works as an academy coach for under-11s at the club Born in Enfield, Grenfell began his career at Tottenham Hotspur, where he failed to break into the first-team squad.
He was loaned to Colchester United for a month-long loan spell in October 1986, making his Football League debut on 31 October in a 3–0 home victory against Wolverhampton Wanderers.
He played in four league matches for the club, scoring once during a 5–2 defeat to Scunthorpe United on 21 November. He made a further 66 appearances for the club to total 70 league games between 1986 and 1988, and scored one further goal for the U"s on 6 December 1986 in a 3–2 defeat to Aldershot.
He played his last game for the club on 11 November 1988, a 2–2 home draw with Torquay United. After leaving Colchester, Grenfell had spells with non-league clubs including Bromley, Dagenham and Aylesbury United, where he made 48 league appearances in two seasons with the Ducks, scoring seven goals.
Grenfell now works for his first club Tottenham Hotspur, where he has had roles as a "Football in the Community" co-ordinator and is a coach for the under-11 academy squad at the club
