Career
After becoming Champions, he joined Milan Samity in 2006 and played in Calcutta Football League 1st Division B group. Then he joined George Telegraph South Carolina (U.S.) where he played for a couple of seasons. While in George, he was settled down nicely in the left back position by coach Raghu Nandy.
In 2007, George Telegraph defeated East Bengal 3-1.
Saha played a vital role in that match. The next year, they defeated both East Bengal and Mohammedan South Carolina (U.S.) in Calcutta Football League to finish in 3rd position.
He also represented West Bengal in Santosh Trophy. Where they finished runners up, losing to Goa in tie-breaker.
Mohun Bagan
In 2012 he re-joined Mohun Bagan.
He played 20 Matches for Mohun Bagan in the 2012-2013 I-League. Salgaocar
He got a good offer from Salgaocar F.C. Also Karim Bencherifa being the coach of Salgaocar prompted him to leave Kolkata.
2011 was definitely the best year of his career so far. He was the only Bengali player in that team
Eagles
On 5 December 2013 it was announced that Biswajit has signed up with Eagles F.C. of Kerala on loan for 2013-2014 season along with Nadong Bhutia, Bijendra Rai, Avinabo Bag, Jagroop Singh, Bisheshwor Singh, Ramandeep Singh and Govin Singh.
Moreover, Image-Reliance, the organisers of the proposed IPL-style football tournament Indian Super League, and Eagles F.C. will facilitate a two to six week training stint for the eight players with United Kingdom based Reading F.C. Academy.
