What do NFL players wear under their jerseys?
A football uniform consists of a helmet, facemask, jersey, pants and padded shirt to protect ribs, sternum and shoulders. Many of them like to wear tight, fitted shirts under their jerseys. Under their uniforms they also wear girdles, which provide them with padding on their hips, thighs and buttocks.
Wear a shirt under your jersey I think every jersey looks great with a ¾ sleeve, or raglan, shirt underneath. It works for every sport, but I realize for those of you in Texas, Florida, and Arizona it can get quite hot.