The jerseys are shinier, the player are a little bit shinier, but there is only so much you can do without editing textures.
I thought messing with the fspec files might be able to produce a sweat effect since someone was able to reduce the shine of players faces by reducing contrast in those files, so I tried by making the whole texture black with some white lines on the face and it didn't do anything.
Edit - we can't do it differently to each jersey, the values change all jerseys, but depending on the jersey, and its buninormal texture, they an be lighted a bit different.