There may be ways to play the numbers that give him a bigger guarantee than $18MM but lower the AAV. Problem is his money is front-loaded. Something like 2/$28MM more or less increases his guarantee substantially ($8MM) but lowers his payout if he has a decent 2019 and his option would have been picked up. Maybe something like $12MM/ $12MM + an option for 2021 at $16MM with a $4MM buyout would balance risk v. lower AAV.
On the other hand, while his post ASB numbers are even better than his season numbers for 2017, the whole thing with him is health, and he's not going to put up those numbers when he's not healthy. This year, he was not right for half the year. He's aging and injury-prone, so you cannot reasonably expect him to put up these numbers for a full year.