Blackpool appointed former West Ham assistant Neil McDonald as their new manager on a one-year rolling deal earlier this month following the resignation of Lee Clark in May.
Sinclair has revealed that he offered his services to the League One outfit, but he was turned down.
The former England international has also stated that he wants to return to West Ham in the future.
@trevor8sinclair Would you like to see your self back at West Ham at some point in the future?— We love you West Ham (@WeLoveYouWHU) June 3, 2015
@trevor8sinclair if you want to manage in the FL, why didn't you apply for the Blackpool job— Joe Preston (@josephpbfc) June 3, 2015
@trevor8sinclair do you have all the badges thats needed to go into coaching/manager still remember that goal you scored as if yesterday— Paul Cleveland (@PaulCleveland10) June 3, 2015
In the process of acquiring my Uefa B https://t.co/ow9EYhcJrf— Trevor Sinclair (@trevor8sinclair) June 3, 2015
Premier League outfit West Ham are looking for a manager at the moment following the departure of Sam Allardyce.
Former Newcastle United boss Allardyce’s contract with the Hammers ran out at the end of the 2014-15 season, and he was not handed a new deal.
West Ham finished 12th in the Premier League in the recently concluded 2014-15 campaign with 47 points from 38 matches.