Pittsburgh RB Cliff Thomas, the league's all-time rushing leader, will be eligible this season.
In terms of career receptions, four of the league's top 10 all-time receivers will be eligible:
Marshall Gibson, STO (2)
Robert Zapata, ORL (5)
John Ayala, CHI (9)
Gerard Hall, MEM (10)
So will four of the top 12 all-time tackle leaders:
Joseph Daughtry, HON (5)
Ralph Johnson, GAF (6)
Keith Bernstein, JAX (11)
Roy Edelman, BOS (12)
Edelman is the career tackles leader among retired LBs. There are two active LBs ahead of him.
And, I am sure I am missing someone. I just took a quick look this morning.