Born in Dublin, Henderson comes from a family of goalkeepers. His father Paddy played for Shamrock Rovers in the 1960s, and older brothers Dave and Stephen played with great success in the League of Ireland in the 1980s and 1990s. His nephew Stephen is who plays for Crystal Palace. Henderson is married to former The Apprentice contestant Liz Locke.
Club career
Henderson played schoolboy football for Dublin side Cherry Orchard, before joining Aston Villa in 1999. He did not play for Villa's first team, but he wore the number 1 shirt in their. During his time at Villa, Henderson was loaned out several times: to Tamworth in March 2004; Wycombe Wanderers, Notts County, and Brighton and Hove Albion. Following his loan spell at Brighton, he was purchased by the club in January 2005. On 30 January 2007, Henderson handed in a transfer request at the Seagulls, and on 31 January he joined Preston North End for a fee of £150,000, which could rise to £250,000 depending on first-team and international appearances. However, after only a handful of appearances for Preston North End, Henderson picked up a serious back injury in August 2007. He was expected to return to training in time for pre season the following season, however complications with the injury kept him out for longer than expected. On 27 February 2009, Henderson signed an initial one-month loan deal with Grimsby Town. Henderson was signed by Grimsby boss Mike Newell to fill the boots of their keeper at the time Phil Barnes whose performances had dipped. Henderson was an integral part of the Grimsby side that managed to stave off relegation from the Football League. On 15 March 2011, after battling against a serious spine injury for over two years and never fully recovering, Henderson was released from his contract at Preston. He announced his retirement the following week.
International career
Henderson represented Republic of Ireland at every level including the U-16 team at the 2000 UEFA European Under-16 Football Championship and the U-20 team at the 2003 FIFA World Youth Championship, and was the first-choice goalkeeper for the Republic of Ireland Under-21 football team. On 16 February 2006 Henderson received his first senior call up to the Republic of Ireland and made his international debut on 1 March 2006, playing in the second half of the 3–0 win over Sweden. He received his second cap in the 1–0 defeat to Chile, although keeping a clean sheet. Henderson was also called up to face the Czech Republic in a Euro 2008 qualifier in October 2006; the final score was 1–1, and against San Marino in a Euro 2008 qualifier, finishing 2 – 1 to Ireland. He was capped six times by the Republic of Ireland from 2006 to 2007.
