Grubb fell two games short of qualifying for the 2006 World Matchplay, losing to
Andy Hamilton who eventually qualified. He then fell one game short of qualifying for the
2007 PDC World Darts Championship. Having beaten
Tom Kirby and
Paul Williams, he lost in the final game to
Wayne Atwood. In 2008, Grubb secured his best ever performance in the PDC Pro Tour, reaching the last 16 in the Players Championship in
Las Vegas, beating
David Fatum and
Tony Ayres before losing to
Mark Frost. Then reached the 1/4's in a pro tour event in Scotland losing a narrow game to Michael Van Gerwen. Grubb made amends after missing out in the 2007 World Championship by claiming one of eight places for the
2009 PDC World Darts Championship, beating England
Martin Whatmough, Hong Kong-born American
Isen Veljic to qualify. He was drawn against number 1 seed
Phil Taylor in the first round but lost the match 3–0. He ran a Darts team in the Somerset Super League called Radstock where he played with close friend and 1992 World Champion runner-up
Mike Gregory. He now runs the Wellington arms at rooks bridge and still plays in the Somerset super league. Grubb rejoined the WDF in 2020 playing in the Las Vegas open, getting to the semifinal before losing narrowly to Chris Lim. He quit the WDF in 2025. ==World Championship Results==