Roshei yeshiva who poke fun at professional sports, whether it be football (22 goyim beating each other up)or baseball (ein mentsch varft a pilka), are displaying ignorance rather than wisdom.
I could say the same thing about chess: what a silly game, moving funny looking wood on a board with silly boxes, and thinking so long about it before they move a piece! What nonsense!
But anyone who understands football, baseball, chess, or almost any sport, realizes that there is a great deal of intelligence, reasoning and strategy involved. And understanding sport is to appreciate it. Is it Torah? No. But it has value, and each person can determine that value for himself.
Why make fun of something one knows nothing about? Rather than presenting a convincing argument, it reflects rather poorly on the commenter himself. These Roshei Yeshiva, as is said in sports, are shooting the puck into their own net.