[3] Foster made a positive start to his Barnsley career, enjoying a regular run in the team at right-back, though he was sent off after two bookable offences during the 3–3 draw with Stoke City at Oakwell on Boxing Day 2007.

[4] On 5 January 2008, Foster scored his first Barnsley goal in an FA Cup third round tie against Blackpool, back-heeling the ball after a corner.

[5] He then scored a headed goal from Martin Devaney's cross against Liverpool at Anfield in a 5th round match on 16 February 2008 that Barnsley won 2–1.

Foster was voted by fans as Barnsley's player of the season for 2007–2008, ahead of club captain Brian Howard and winger Jamal Campbell-Ryce, second and third respectively.

Foster then joined Tranmere in June 2013 on a two-year deal, but played just four games for Rovers before the 33-year-old's contract was terminated by mutual consent in February 2014.