The Fritz Pollard Alliance has put forward four minority candidates for the job – although refused to identify who they are.
Tagliabue says he will step down from the post in July – although recently hinted he would stay on for longer in order to ensure the right man for the job was selected.
FPA founder Cyrus Mehri said: “Just like the FP Alliance has done for all positions in the NFL over the last few years - coaches and front-office positions - we prepared a list of candidates. At some point we would expect an announcement of the list of finalists."
Team owners are expected to meet again later this month to discuss appointing a successor.
