The medical term was gynecomastia, but around the clubhouse they called them "b---- t---" or "man boobs" - and heaven help the player who sprouted them in the middle of his career and then took his shirt off in the locker room," the Daily News reporters wrote in "American Icon." "Roger Clemens had man boobs, and he must have been embarrassed because he was often the first Yankee out of the shower and the first to get dressed after the game."

Want some video proof? Sure you do. The author cites this 2007 Letterman clip, brought to her attention by Jose Canseco:

Read more: "Not just A-Rod: Roger Clemens also suffered from 'man boobs', upcoming book 'American Icon' reveals"

[Tip o’ the hat to Caio for the find.]