Liverpool Born in
Liverpool, Threlfall began his career moving through the
Liverpool youth ranks, training at
the club's academy and eventually graduating to
Melwood in the
2006–07 season. Threlfall twice won the
FA Youth Cup at Liverpool; first in 2006, then again in the following season's competition. Subsequently, he became a regular in the Liverpool Reserves, also making his
England Under-19 debut against
Poland in
Bournemouth on 6 February 2007. Threlfall played a major role in the 2007
FA Youth Cup final, firstly scoring a first-leg own-goal which put rivals
Manchester United ahead. He scored in the second-leg to level the score and finished a crucial penalty kick helping the
Merseyside club retain the title. Whilst with Liverpool he was capped once by England at Under 19 level.
Lower division loans He spent much of the 2007–08 season on loan at
Hereford United but was only able to play 12 games as a result of an injury sustained in the FA Cup against Hartlepool. Threlfall re-signed for the Bulls on loan for six months, at the start of the 2008–09 season. He started the first three league games of the season, as well as a
League Cup match, before breaking his foot in early September. He later joined
Stockport County on loan for a month on 6 February 2009, consequently making two league appearances. A further loan followed at
League Two side
Northampton Town from 21 August 2009, with his club debut coming the next day coming on as an injury time substitute for
Ryan Gilligan in the Cobblers 2–0 win over
AFC Bournemouth. His first start came in 2–2 draw against
Wycombe Wanderers in the
Football League Trophy, Northampton won 3–0 on penalties. In October 2009, he was set to make another loan move this time to
Darlington but had a change of heart the following day. In February 2010, he joined
Bradford City on loan to become new manager
Peter Taylor's first signing, and scored on his debut on 23 February in a 3–1 win against
Rochdale. His second career goal came against
Port Vale three games later. On 22 March, it was announced that his loan deal had been extended until the end of the season. On 26 May, Liverpool announced they would be releasing Threlfall, along with goalkeeper Chris Oldfield.
Morecambe He signed for League 2 side,
Morecambe on a two-year contract, on 17 May 2012. He scored his first goal for Morecambe against
Rotherham United on 6 April 2013. Threlfall was released by the club on 6 May 2014.
Marine In the 2016/17 season he returned to playing semi-professionally, making sixteen appearances and scoring twice for
Marine F.C. before leaving the club in January 2017. ==Honours==