Darren Blewitt was in Norwich's Under-12s schoolboy side in 1997/98. He later joined West Ham where he has become a centre-back. He spent the spring of 2005 on loan to League Two side Southend. He was loaned out to Conference side Hereford in August 2005 but then returned to Upton Park. Following a trial with Oxford United in the spring of 2006, Darren was one of six players released by the Hammers on 24th May 2006.

Blewitt joined Dagenham and Redbridge on trial, playing in their July 2006 pre-season friendly with Kings Lynn. He eventually ended up playing for Billericay

Darren was released by Billericay at the end of the 2007/8 season but joined their Essex neighbours Heybridge Swifts. In September 2008, he signed for their Ryman League rivals Enfield Town. By February 2009, he was with Brentwood and by the following September, Darren had joined Aveley, He returned to Brentwood

Blewitt signed for Harlow in August 2013.