The big problem is:
His number 9 slot is $4.7 million
Draft rules state he must sign before going back to school in August.
There is no way that Oakland wants to give him full amount to have it get hurt playing QB.
So either they are going to try to get him to sign significantly under slot or abandon football.
Murray was originally expected to be closer 19th. (MLB had him as 36th prospect.) If Oakland offered him pick 19 money, $3.2 million to sign and still let him play football, that is a huge decision. $1.5 million sacrifice for a season of QB. Also, Oakland could sign a LOT of players over slot for that savings.
At the same time, Murray is shorter than Russell Wilson and Mayfield so his NFL prospects are a stretch.