MJ, retired BGMI player

Celtz gave Harshit Mahajan his first recorded jersey in 2019, and the side became his launchpad. Liquipedia's Celtz squad table lists him as an assaulter in the lineup that won the PUBG Mobile Pro League South Asia Season 1 finals in June 2020, and the roster moved to Galaxy Racer on 3 July 2020, weeks before a 14th place finish at the PUBG Mobile World League 2020 East.

Nigma Galaxy carried the next stretch of his career, a spell Liquipedia's transfer record dates from July 2020 to October 2022. He was part of the roster that played the LOCO Diwali Battle alongside Seervi, Ted and Skrillz, and the Nigma years brought first place at the Pro Warrior Cup Season 2 ultimate round and the Rooter Invitational Series, plus sixth place at BMPS Season 1.

In 2023 he joined Revenant Esports with Sensei, Fierce and Apollo, and the new lineup finished runners-up at the Nodwin x Rooter Champions Cup on 194 points, twenty five behind Gladiators Esports, for six lakh rupees. The Revenant spell also brought seventh place at BGIS 2023 and second place at the Skyesports Championship 5.0 that November.

January 2024 brought the Gujarat Tigers move: MJ joined ClutchGod, Shadow and Wixxky in the organisation's veteran rebuild, a squad built openly to chase a Pro Series podium. They reached the iQOO Pro Series finals and the Snapdragon LAN. Liquipedia's transfer record then takes him to K9 Esports in August 2024, and the same record marks him retired on 10 January 2025, which makes K9 his last side.