Walsh defeated Jamie Caven 3-2 in the first round of the 2009 PDC World Championship, narrowly missing out on a nine dart finish on the way. In the second round he lost 4-2 to King. On 17 January, Walsh hit a nine-dart finish in the Eddie Cox Memorial Players Championship in Gibraltar against Caven to win the deciding leg of their first round match. Having rolled over for four Players Championships, Walsh won £1,600 for the nine-darter.