I missed the two Dolphins receivers (one of which says "Dophins"), the Bills receiver, the older Packers receiver and the oldest Colts receiver. I think that pretty well dates me as an NFL fan.
Given the rules of the day, the fact that Unitas-Berry are on here just goes to show what a phenomenal QB Unitas was, and how far ahead of his time he was.
Also, until 1961 the NFL only played 12 games a year; that went up to 14 in '61. Compared to the modern 16/17 game seasons, that's a lot fewer opportunities.