Career
Callaghan began his career with Dundee United and was given his only senior appearance for the club by then-manager Ian McCall in March 2005, as a substitute against Aberdeen. In August 2006, Callaghan joined Queen of the South, where McCall was now manager, on a six-month loan transfer. Callaghan"s single senior appearance for Dundee United was his last after the club announced he, along with Gregg Burnett, would be leaving at the end of the season.
Callaghan signed for Brechin in June 2007 but was released in May 2008, having made the last of his four appearances in September 2007.
lieutenant is unknown where Callaghan is currently playing.