East Bengal lost to DSK Shivajians 0-1 a week after going down 1-2 to arch-rivals Mohun Bagan. Previously, Chennai City FC and Churchill Brothers too beat them away and at home, respectively.
With only two matches remaining, East Bengal are six points behind league leaders and arch-foes Mohun Bagan.
"I have got the resignation letter from Trevor. I don't know about the future course of action. You should talk to the club secretary (Kalyan Majumder) to know about it," said Santosh Bhattacharya, the football secretary who played the pivotal role in ensuring Morgan comes back for a second innings in Kolkata.
Manoranjan Bhattacharya and Tushar Rakshit will be taking charge of the red and gold brigade for the remainder of the I-League season.
East Bengal (27 points from 16 matches) will play Minerva Punjab FC and Mumbai FC in their two remaining matches in the I-League.