Good rule of thumb if you play in the NFL: don't wear clothing with another team's logo out in public. And if you're going to play football for your team definitely don't sport someone else's logo. LeSean McCoy did just that, though, and will probably hear about it all week long.
Now, it's a pretty sweet throwback piece and I'm fairly sure that he's repping the Los Angeles Raiders with that particularly piece of clothing. But he's probably going to catch a lot of grief for this.