on 17 August 2009. His debut was granted on the very same day and only hours after he had signed the deal, when he managed to keep a clean sheet in the 1–0 win against FC Midtjylland. Having played just 14 Superliga games, he was named 2009 Superliga Goalkeeper of the Year in December 2009, in a vote amongst the league goalkeepers. In November 2010, Carroll announced his decision to leave Odense BK in order to return to Britain to be closer to his family. The club soon signed Stefan Wessels as his replacement. Carroll's contract was mutually terminated on 31 January 2011 and he left Odense BK as a free agent, in search of a new club. 2011 trial spells Carroll was on trial at Sheffield United in March 2011. However, he conceded two goals within ten minutes and was sent off, which led to a penalty during a reserve match against Barnsley. As a result of his poor performance whilst on trial, he was not offered a contract with the Blades. Later that same month, Carroll joined League Two strugglers Barnet on a trial with a view to a role as player-coach. After the departure of Martin Allen as manager in April 2011, and with caretaker manager Giuliano Grazioli on a scouting mission, Carroll was appointed as manager for the Herts Senior Cup final against Stevenage, which Barnet won 2–1. Thus, Carroll won a trophy in his only game as a football manager. He reportedly left the club in protest in April 2011, as his former Northern Ireland manager Lawrie Sanchez was set to take a managerial role in the club. In July 2011, Carroll joined Preston North End on trial and played in a 7–1 friendly victory at Kendal Town. However, despite a deal for Preston to sign Carroll being close, the club opted to sign Iain Turner instead. OFI Crete In August 2011 Carroll signed a two-year contract with Greek Superleague side OFI Crete. Despite struggling for fitness and form in pre-season, Carroll appeared 16 times for the club, putting in some impressive performances, which made him highly regarded in Greece. He was ranked third in shots saved statistics amid speculation that bigger clubs in Greece were interested in Carroll. Olympiacos In January 2012 Carroll signed a contract with Greek Superleague champions Olympiacos for a reported transfer fee of . His first appearance was against Rubin