Andy Crosby is a former defender who was born 3rd March 1973 in Rotherham. Crosby began his career at Leeds United, but left the club in 1991 to join Doncaster Rovers. Donny were competing in the fourth tier of English football, which is where Crosby would end up spending the majority of his playing career. After 51 matches at Belle Vue, Crosby joined Darlington for a five year spell. After appearing 181 times for The Quakers, Crosby spent the 1998/99 season at Chester, before a two year stay with Brighton. In 2001 Crosby moved to Oxford, playing 111 times over a three year period which also saw the defender score 12 times.
Brian Laws took Crosby to Scunthorpe United in 2004. Crosby helped Scunny gain promotion from League 2 in his first season at the club. He was part of the side that went up to the Championship in 2007 under Nigel Adkins, who took over in December 2006. Crosby was soon handed the role of player coach at Glanford Park and had a solid season when The Iron finished second bottom in their first season in the second tier since 1964. Injury hampered his final season at the club, which saw Scunthorpe regain promotion to the Championship after just one season away. Crosby scored one of the penalties in a successful shoot-out win for Scunny in the play-off semi final against MK Dons. Crosby also played the full 90 minutes of the 3-2 final victory against Millwall.
From 2009/10 Crosby concentrated on assisting Adkins and helped the club avoid relegation back to League 1 again. When Adkins was appointed new Southampton manager on September 12th 2010 Crosby immediately followed to assist him.