*Club domestic league appearances and goals, correct as of 21:36, 6 December 2021 (UTC) ‡ National team caps and goals, correct as of 19 September 2023
For the 2019–20 season, Rathi was called up to the senior team by manager Antonio Lopez Habas. He was declared 'Hero of the Match' in the match against Mumbai City in the 11th round of the season.[5] After making 14 appearances in his breakthrough season and impressing throughout, as well as helping ATK to their 3rd ISL trophy, he was declared the Emerging Player of the Season for 2019–20.[6]
2020–2021 season
On 14 August Sumit Rathi signed a five-year contract for Mohun Bagan SG keeping him till 2025.[7][8][2]