[3] On 15 November 2013, Das joined Goan giant Dempo SC from Pailan Arrows for a one-year deal on loan.
[7] In July 2016, Das signed for former ISL champion Atletico de Kolkata on loan from Mohun Bagan.
[12] On 21 September, Das made his debut for the club in the Indian Super League, in the season opener against Bengaluru FC at home, which the Blasters won 2–1.
[13] After the Kerala Blasters' 2–1 loss against Mumbai City on 8 October, Das was handed over a three match suspension after the AIFF disciplinary committee's report cited Prabir's aggressive actions against a referee during the game.
However his suspension led to some controversy as it was alleged that Prabir’s actions were accidental, and that he was entangled in a brawl with a Mumbai City FC player at the time.
[15][16] He made his debut away against East Bengal FC, coming on during stoppage time as a substitute for Bipin Singh and helping his new team secure a 3-2 win away from home.