Fullback Zak Sturge, who played for Millwall in the second half of last season, is currently discussing a permanent transfer to the New Den.
Young players Alex Matos and Alfie Gilchrist are also expected to leave Chelsea this summer. Matos spent the past season with Oxford United, while Gilchrist was with Sheffield United.
Attacker Leo Castledine is another young player who is in talks with other teams about a possible transfer.