Claydon played on the European Tour from 1989 to 2004. He was in the top one hundred on the Order of Merit every year from 1990 to 1999, with a best placing of twentieth in 1997. He had six second place tournament finishes on the tour before picking up his first and only win at the 1998 BMW International Open.
Claydon struggled for form in the new Millennium and by 2005 he was playing few tournaments. However he remained involved with the European Tour as a member of its Board of Directors.
Claydon was a member of England's three man team in the 1997 Alfred Dunhill Cup.