Here are four of the possible 42 "Football Super Freaks" stickers printed in 1974 by Donruss. I would have happily shown you more than four, but four is all I have, and that's four more then you'll find anywhere else on the internet.
That's surprising because I would have thought someone would have posted the entire collection by now. The art work on the stickers is good, and looks like it could be the work of Jack Davis (or someone doing a very good imitation). Unfortunately, the "funny" text on the back of the stickers is not very good.