In November 2015, Adams made his first PDC tournament appearance since 2007, at the 2015 Grand Slam of Darts, where topped his group with three wins of out of three, with victories against Ian White and two former BDO World Champions in Jelle Klaasen and Steve Beaton. In the last 16, Adams faced Kim Huybrechts where he narrowly lost 10-9. Adams rallied from 6-3 and 9-7 deficits to force a decisive leg which Huybrechts won on a 13 darter. In his post-match interview, Adams praised the crowds and said he would likely return to the tournament next year if invited.