No location has been determined for the event. MMA Junkie was the first to report the news.
A former Pro Bowl defensive end, Hardy has been training in MMA since 2016 and made his pro debut in 2018. He earned his way to a UFC contract with two first-round TKOs on Dana White's Contender Series and had his first fight with the promotion in January 2019.
Hardy was convicted on a domestic violence charge in 2014, but it was later overturned on appeal when the woman who accused Hardy didn't show up to a jury trial.
Greene (9-4) is coming off a third-round submission win over Gian Villante in June. The 6-foot-7 Virginia native snapped a two-fight losing streak with that victory. Greene, 34, is nicknamed "The Crochet Boss" due to his being a crocheting enthusiast for more than a decade.