I tried to get some info for you.
Using puja's 4.0, I played as The Bears at The 49ers with flurries. I started a game, checked out the sleeves and then did about 5 rematches of the same teams. I then switched the game to Chicago and started a few games.
Funny thing is that all of the players changed sleeves just about every game. They either had white sleeves, black sleeves or none at all. Very strange.
But then there's Nate Clements.
Not matter what stadium or jersey color I put them in, he always had on the red team sleeves. Even when I gave him black or white sleeves in the roster, he still wore the red one in game.