Joe Greene
Joe Greene played as defensive tackle for the Pittsburgh Steelers from 1969 until 1981. He was known as “Mean Joe,” and had the reputation for not being able to be blocked. His toughness led his team to Super Bowl championships two times.
Dick Butkus
Dick Butkus played as linebacker for the Chicago Bears from 1965 until 1973. If you want to know how tough Butkus was, here’s what he said on a CBS broadcast: “If a guy celebrated like that on me, I’d wait for the next series of downs and do a little celebration of my own on him. Then after he woke up — if he did — I’d say, ‘Well, want to dance some more, hot dog?’ ”