Sayan scored four goals and made three assists for Goalorious Mother SC playing in the 2021–22 MFA Elite Division.
[1] Sayan signed for East Bengal in 2023 on a three-year contract after impressing in the 2023 Calcutta Premier Division for Kalighat Milan Sangha.
[2] Sayan was registered into the East Bengal squad for the 2024 Indian Super Cup and made his debut for the club on 19 January 2024 in the Kolkata Derby against Mohun Bagan SG in a 3–1 victory when he came in as a substitute for Nandhakumar Sekar in the 97th minute of the match.
[3] Sayan also made an appearance in the final as East Bengal became champions of the 2024 Indian Super Cup defeating Odisha 3–2.
[4] Sayan made his Indian Super League debut on 3 February 2024 in the Kolkata Derby once again against Mohun Bagan SG, when he came in as a substitute for P. V. Vishnu in the 63rd minute of the match.