Unless the team is sold, there’s zero chance the A’s keep him all 4 years. Remember, while his term is controlled, the salary is not. The way he’s playing, there’s a good chance he’s going to get raises every year in arbitration. His number could go way up and outside of what they are comfortable paying as soon as this offseason
Also, he’s going to demand an early extension. He’s earned it through his play and there a ton of teams out there that would’ve already given it . The A’s don’t have that kind of money to commit to any closer. Bottom line, they will almost certainly be trading him at some point in the next 2 1/2 years.