On 24 July 2023, Mancini signed for National League side Hartlepool United after impressing during a pre-season trial.[11] He scored his first league goal for Hartlepool in a 3–1 home victory against Maidenhead United.[12] After an impressive start to the season which had seen Mancini voted as the supporters' Player of the Month for August, it was announced on 1 September that he would be ruled out for a minimum of six months due to a hamstring injury.[13][14] However, Mancini returned early from injury, making a substitute appearance in a home defeat to Oldham Athletic on 26 December.[15] He sustained a groin injury at the end of January 2024.[16] He returned from that injury as a substitute in a match against Southend United but was taken off 12 minutes later.[16] At the end of the season, Hartlepool took the option to extend his contract.[17]
International career
He has represented France at under-18 and under-19 level.[3]