Exactly. When you sign them early, you take away risk from them and replace it not only with more compensation, but some form of guarantee.
The longer that contract plays out, the less risk the player faces. Unless he has a catastrophic year or an injury, his price will not go down as the season progresses.
But I have no feel for how much he will get. I underestimated Nelson's attractiveness to the Packers and slot guys are now more in demand than ever. But right now, he would need to climb another step for me to predict he will clear $9 mil per year.