1972 Topps football card of former Pittsburgh Steeler L.C. Greenwood, who passed away recently. Although he was overshadowed by his more famous teammates like Mean Joe Greene, Jack Lambert and Mel Blount, Greenwood was a key player on the “Steel Curtain” defensive units that dominated the NFL during the Steelers’ run of four Super Bowls in the 1970s. Known for wearing gold spikes during games (which would get him fined in today’s NFL), he was a six time Pro Bowler in his 13 year career. Greenwood was a member of the All Decade team for the 1970s, and has been a finalist for the Pro Football Hall of Fame a couple of times, but has yet to be voted in.