Born in Chester, Jeffs came through the youth ranks at Crewe Alexandra and was awarded his first professional contract in February 2001 along with eleven other academy graduates, including Dean Ashton, David Vaughan and Michael Higdon.
[2] On 16 May 2003, it was announced that he and teammate Tom Betts were to join newly promoted Icelandic Úrvalsdeild outfit ÍBV on loan for the duration of the 2003 campaign.
[9] Jeffs and Betts returned to Crewe at the end of their loan period and were given international clearance to play for the Railwaymen following the re-opening of the transfer window on 1 January 2004.
[10] Jeffs went on to make his debut for the club two days later, coming on as a second-half substitute for Ben Rix as Crewe were beaten 0–1 at home by Telford United in the third round of the FA Cup.
[11] He was never selected to play for the club again and was released at the end of the 2003–04 campaign,[12] having already agreed to return to ÍBV on a permanent basis for the 2004 season.