Which is a good thing for him because players back then weren't nearly as quick, strong and versatile as they are now (or when Barry Sanders was playing for that matter). Defensive schemes are 100x deeper than they were 40 years ago. Jim Brown would not be running over LBs in this day and age like he was doing back in the day. It's a completely different game and you don't seem to be taking any of that in as you form your opinion.
Talk about shemes all you want…but the game still boils down to running and tackling. With all the great schemes that are “100x deeper” than they were 40 years ago…how many missed tackles do you see out there on Sundays? What good is a scheme when you don’t wrap up…get ran over…or get faked out?
Brown was 6-2 and around 230 pounds. Most backs today aren’t even that big...so what makes you think he wouldn’t be running people over. He played basketball and la crosse too…so not only was he big and strong…he was also fast and agile.
Look up his 40 yard dash time…clocked at 4.4/4.5. The man was a beast…and I don’t think he would have a problem doing the same things today that he did back then.