Blasters had earlier retained C.K. Vineeth as their first senior player before the draft which is scheduled to take place later this month.
Let us have a look at some of the players which other teams have retained.
2017 Indian Super League pre-auction updates
Jeje Lalpekhlua signs a lucrative deal with the club
One of the best forwards in ISL, Jeje Lalpekhlua has signed a lucrative three-year deal with Chennaiyin FC.
While the details of the contract have not been disclosed, it is supposed to make Jeje one of the richest players in the ISL.
The Chennai based team had earlier retained 31-year old goal-keeper Karanjit Singh for two more years.
Pune City retain Vishal Kaith
Pune City FC have retained 20-year old goal-keeper Vishal Kaith, even though he didn't make a single appearance for the team last year. However, his performance with the Shillong Lajong FC team has been impressive.
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Atletico de Kolkata
A winger, a goal-keeper and a new Director
After signing Prabir Das and Debjit Majumder for the next season, the defending champions Atletico de Kolkata have appointed former Bengaluru FC manager Ashley Westwood as their new Director of Football.
Westwood had managed Bengaluru for three years and guided the team to two I-League titles and a Confederation Cup victory.
Kolkata are yet to name the new head coach.
After Amrinder Singh, Mumbai City FC retain Sehnaj Singh
Mumbai City FC have retained Sehnaj Singh for the upcoming season of the ISL. The club had earlier announced their decision to retain goal-keeper Amrinder Singh for the fourth season of the league.
Doping charges: Goalkeeper Subrata Paul escapes with a warning