In 2005 having joined the PGA Tour (see below), Harrington played fewer events on the European Tour and experienced his first winless year on the tour since 1999. In 2006 Harrington was once again a winner on the European Tour at the 2006 Alfred Dunhill Links Championship, this was his second links golf win having also won the event in 2002 and was a prelude for his future Open Championship success. Following this Harrington won the 2006 European Tour Order of Merit, coming after a titanic battle with Paul Casey and David Howell, which was won on the last hole of the last event. Sergio García bogeyed the 72nd hole in the season ending Volvo Masters to give Harrington a share of second place which earned him enough money to leapfrog Paul Casey to 1st place on the Order of Merit.