Okay let's clear this up.
I have no problem with Loren Toews from the '74 Steelers on Cal Golden Bears. Althought he didn't start a game, he played in 14 and recovered 3 fumbles so he did have an impact on defense.
Jeff Winans did start 3 games, per his football-reference page, at Guard for the '75 Bills so he is also eligible.
Casey Wiegmann needs to be changed as he did play for the 1998 Bears, not the Broncos. Good catch!
Again, for kick/punt returners, they need to have returned at least 1 punt/kick for the associated special teams unit otherwise they are not eligible. I will verify everyone's roster before the league starts.
Hopefully this is acceptable to everybody.