When an NFL player passes the point of quality production and enters into the world of mediocrity, he can officially be labeled a has-been.
It happens to all too many guys over the course of their career.
Maybe injuries ruin them or they can't let go of the game past their prime or maybe they just get lazy.
Whatever the reason, players become has-beens every year.
So who are the best (or worst?) examples of this grim reality in the NFL today?
Is the list flooded with old quarterbacks or will there be some big-name defensive players thrown into the mix as well?
Here are the 15 biggest has-beens in the NFL today.