Thanks, I enjoy explaining a lot: my kids learned after years of "How does this work, Dad?" to qualify their questions with a "length of explanation I have time for" clause.
When it comes to sports you can always find a differing opinion. Kind of like economics. Harry truman once said he wanted to hire a one armed economist, because all of his economic advisors qualified everything with "on the other hand." ESPN would surely have ceased to exist long ago if their opinions could be subjected to the same objective standards as physics.
As a guy who doesn't believe he was small, slow and white in his long ago prime, let me take a parting shot:
Dick Butkus, who Tom Brady is happy is doesn't have to face. [Small, slow, and white.] 
Tony Dorsett, 100% faster than any white guy, discovers Jack Lambert is small, slow, and white...
Butkus was a huge linebacker for his era - 6'3” 245 pounds.
Great quickness, great anticipation, great tackling mechanics, but his 40 speed, which they did run for time back then, was never below 5.0.
Butkus would struggle with pass protection in the modern era.
2015 tight ends are as big or bigger than he is, and Butkus lacked the lateral speed to keep up with any of the 2015 slot receivers.
I can't find a 40 time on Lambert, but at 6'4” 220 pounds there would be no defensive position he could play in 2015.
He'd be too slow to play strong safety in 2015, which I think is 100% Black.
He would probably be an elite Special Teams player.
If he had good hands, they might be able to make a situational receiver out of him, specifically in the Red Zone or in multiple tight end formations.
Dorsett weighed just 192lbs, almost 30 pounds less than Lambert.
The photo is clearly a pass play, and Dorsett clearly caught it with his back to Lambert.
Even in the 1970’s, a choke hold tackle like that would draw a flag.
By the way, I come from a family of football fanatics, and I've seen almost every player we talked about, including all 9 home games of the Dolphin's perfect season.
I never saw Otto Graham play, however.