Announcing a football game is probably a lot tougher than it looks. You've got to know all the players & coaches and be able to identify them quickly. You've got to know backstories and histories on both teams. You need to have an understanding of the bigger picture and how this game fits into it. And unless you're the team play-by-play guy, you probably go into the game with a very limited knowledge of most of these things.
So I don't think we expect TV announcers to be perfect. We do hope, at least, that they'll get the names of the players right.