Mellor, now 24, never broke into United's Premier League squad but made a single senior appearance in a 2019 Europa League clash against Astana, a game where Greenwood also featured. Mellor, who substituted in for Tahith Chong during that game, eventually left Old Trafford permanently in 2022 to sign with Wycombe Wanderers. He now plays under the stewardship of Robbie Savage at non-league outfit Macclesfield FC.