"Can you imagine any of today's college jocks (a) calling themselves the Whiffenpoofs, and (b) singing Baa Baa Baa with a straight face?"

Well, I don't know if any of them are jocks are not; their biographies don't say. I'm guessing they're not, if only because their busy schedule of rehearsing and performing would probably interfere with the demands of being on a sports team. This was probably always the case.

But they're still singing The Whiffenpoof Song. I can't see whether their faces are straight or not, but I'm guessing they are.