Eja, thanks for adding the "ancients" to the poll. Sometimes I forget how old I am and get sobering reminders like this which show my age.
It was tough between Gale Sayers and Lou Gerhig.
I voted Gerhig because of the ALS shortening his career and it was an incredible career.
Sayers, though, was the most talented running back that I have ever seen. Power, speed, agility, shiftiness, smooth, he looked looked like he was running in slow motion. Ran back punts and kickoffs too. A staggering talent who's knees did him in. His nickname, the Kansas Comet, was appropriate, not just because of his blazing speed, but because he flared out way too soon.
Thanks again for the additions.