Jenkins made the third round of the 2010 PDC World Darts Championship, beating Paul Nicholson 3–2 in the first round, Darin Young 4–0 in the second round, before losing to Simon Whitlock 4–2 in the third round. He made the second round of the 2010 Players Championship Finals where he gave Phil Taylor an almighty scare but narrowly lost a terrific match 8–7. However, the 2010 Premier League Darts was the worst of his career so far with Jenkins finishing in last place. His performances in floor tournaments have been less than impressive, having lost several early round matches to relatively unknown players. Jenkins's poor form continued into the 2010 World Matchplay Darts with a 10–6 first round defeat to Steve Brown, who was ranked No 49 in the Order of Merit at the start of the match. The defeat saw Sky Sports' pundit Rod Harrington heavily criticise Jenkins live on air for being a lazy exhibition player, comments Harrington had been making throughout the Premier League campaign, despite the fact that Jenkins was the third highest prize money earner in 2009. Jenkins reaction to those comments saw him reach the semi final of the 2010 European Championship Darts, losing narrowly again to Phil Taylor in a classic 11–10, but showing a welcome return to form. Jenkins had a decent 2010 Grand Slam of Darts, beating Tony O'Shea in the 2nd round before succumbing to a final leg decider to James Wade. Following his Grand Slam of Darts quarter final defeat to Wade, Jenkins said in an interview that he believed players raise their game when they play him, as an example, Raymond van Barneveld struggled for form during the Premier League campaign, but managed to beat Jenkins twice and hit a nine darter against him.