Larry K. has generously provided some details on the locker room photos posted earlier today. Rather than edit each individual post, I'm listing the info here. Thanks, Larry!
Photo 2 (the trainer working on the player) a photo of the Boston Red Sox, taken by George Silk in 1956. I don’’t know the player’s name.
Photo 3 (University of Nebraska) is by Alfred Eisenstaedt, from an undated series called “Nebraska vs Iowa Football."
Photo 4 is not Harvard players. It depicts the MIT crew team holding Harvard shirts which they got by beating Harvard. From a photo series “Eastern Sprint Championship” taken by Michael Rougier in 1950.
Photo 5 (Roy Campanella) was taken by Yale Joel in 1955, from a series called “Brooklyn Baseball"
Photo 5 is the same Cleveland Browns player as photo 1. In both photos he is standing in the same place (in front of a doorway with steps in the background) and wringing out a cloth. But for some reason he is minus his shorts in photo 1. Maybe he’s wringing out his shorts?