Charlie Cowan had a long career in the National Football League which went 206 Games deep, all with the Los Angeles Rams.  Cowan shifted from Left Guard to Right Tackle to Left Tackle, and regardless of where he was on the O-Line, he was a steady presence.  From 1968 to 1970 he was a Pro Bowl Selection, and he was twice a Second Team All-Pro (1968 & 1973).  He was not the best Offensive Lineman that the Rams ever had, but his long-duration earned him this substantial rank.