For me, #56 immediately means Thomas "Hollywood" Henderson. What a character. Fantastic athlete but never reached his full potential due to drugs and shenanigans. I haven't seen anyone else run a reverse handoff to a linebacker on kickoffs, much less have it turn into a big gain, since Henderson was doing it for Dallas. In SB X, Henderson did such a reverse on the opening kickoff. His 48 yard gallop got the ball to Pittsburgh's 44 yard line.
Henderson wasn't exactly highly recruited. He originally joined the Air Force out of high school but quit before being sworn in. He walked on to the football team at Langston University, became an NAIA All-American at defensive end, and ran 100 meters in 9.5 seconds. Dallas took him in the first round of the 1975 draft. Lawrence Taylor said he wore #56 because of Thomas Henderson.
Henderson ended up in prison thanks to cocaine and stupidity. But that experience sobered him up and eventually he became a motivational speaker and a $28 million lottery winner in Texas. I'm not sure, but I think he hit the lotto twice - can any Texans confirm?
56 days to Tampa Bay