[6] Mewalal's playing career with a reported 1032 goals along with 32 hat-tricks in both the official and exhibition matches, was ended in 1958 due to an injury.

He spent his early days playing football with the seeds of a tar tree near the banks of the Khuri River, which flows through his village.

Once in Calcutta, Mewalel's footballing talent was noticed by Sergeant Barnett who helped him join the Morning Star Club.

Known for his ability to shoot with both feet, Mewalal credited Sergeant R. Blackey for helping him learn the technique.

Mewalal also represented Bengal in Santosh Trophy and played alongside Sailen Manna,[12] and won the tournament in 1953–54 season, in which he scored a goal in their 3–1 win against Mysore in final.

Managed by Balaidas Chatterjee, Bengal won multiple Santosh Trophy titles during that time,[13] and Mewalal scored all total 39 goals for the team.

[7] Mewalal started his senior career in 1938 with Kidderpore SC which was then playing in the 2nd Division of the Calcutta Football League.

[34][35][36] In March 1951, at the inaugural 1951 Asian Games in New Delhi, he finished as the top scorer with four goals, with India winning the gold medal.

[6] Mewalel was the first player after independence to score a hat-trick for India in a 4–0 victory over Burma in the 1952 Asian Quadrangular Football Tournament.

[41][42][43] In the mid-1970s, Mewalal became interim manager of India national football team and guided them achieving third place in 1977 King's Cup.