The NFL was like an eight-team league back then so even a 19th-round pick probably wasn’t that bad a football player.
He was probably no larger than your typical NFL tight end of today.
12 teams. Six east, six west. Let's see?
East: Giants, Browns, Steelers, Eagles, Redskins, Cardinals
West: Bears, Rams, 49ers, Colts, Packers, Lions
Actually, the NFL was not similar to an eight-team league in any way, shape, or form back in the 1950's.
Heck, today there are kickers that are bigger than the linebackers back then.