place in the Conference Premier play-offs. The following campaign, Foster was again a regular under manager Chris Wilder, appearing in all of Oxford's games up until December 2009. He scored his first goal of the season in Oxford's 1–1 draw against Barrow on 3 October 2009. Foster was sent off in a 1–1 draw against Barrow in the FA Cup on 28 November 2009, resulting in Barrow being awarded a penalty kick and subsequently scoring. In January 2010, Wilder stated that Oxford would not be extending Foster's contract in the summer, with Foster "wanting that option to pursue offers from other clubs". Mansfield Town He subsequently entered talks with Cambridge United in January 2010, although no transfer materialised. Mansfield Town also enquired about signing Foster, although they initially decided against making a transfer bid, citing Foster's "high wages as the main stumbling block". However, a week later, Mansfield signed Foster on a one-and-a-half-year contract for an undisclosed fee and he was instantly appointed the club captain. He made his debut in Mansfield's 4–1 victory over Forest Green Rovers on 30 January 2010. Foster was sent off in a 1–0 defeat to York on 16 March 2010, which resulted in him receiving a two-match suspension. He made 16 appearances for Mansfield during the second half of the 2009–10 season. At the end of the season, Foster made a comment on his Facebook page, calling the club a "shambles", but later apologised to both the club and its fans. He was released in May 2010, with Mansfield boss David Holdsworth saying "it's a practical decision for both the club and Luke". Stevenage Foster joined newly promoted League Two club Stevenage on a two-year contract on 31 May 2010. Foster made his Stevenage debut in the club's first Football League fixture, a 2–2 draw against Macclesfield Town, playing the whole game in the centre of defence. After the Macclesfield game, Foster did not play in the first-team until late September 2010, coming on as a late substitute in Stevenage's 1–0 away win at Lincoln City. He then appeared as a 52nd-minute substitute in the club's victory over Burton Albion, but was sent-off for a foul on Shaun Harrad. Foster scored his first goal for Stevenage on 3 January 2011, scoring the first goal of the game in Stevenage's 4–2 home win over Barnet. Foster received his second red card of the 2010–11 season