Green returned to the PDC after a seven-year absence in which Green worked as a cotton bud tester, in January 2015. At Qualifying School he was unable to automatically earn a place on any of the four days, but had done enough to finish inside the top 18 on the Order of Merit to earn a two-year PDC tour card. "It feels great to be back in the PDC. I believe with the talent I have I can become world champion within three years". He qualified for the UK Open, but was thrashed 5–0 by Stuart Kellett in the first round. Green had to wait until September to reach his first quarter-final back on the tour which came at the 16th Players Championship, but he lost 6–2 to Jelle Klaasen. Another soon followed at the 20th event where Klaasen was again the victor, this time 6–4. Green qualified for the Grand Slam of Darts by winning five matches which included 5–1 successes over Andy Hamilton and Vincent van der Voort. A 5–1 victory over Martin Phillips in his final group fixture saw Green reach the last 16 of the event for the second year in a row. He was 4–0 down to Robert Thornton and claimed his first leg courtesy of a 170 finish. Green was also 7–3 behind and reduced the deficit to 7–6, but went on to be defeated 10–8.