The A's have several key players eligible for arbitration this offseason. Each year, MLB Trade Rumors projects arbitration salaries for every team. Here are the numbers they project for Oakland in 2019...
Khris Davis - $18.1 million
When you lead all of baseball in home runs, you're obviously going to get paid. The A's were able to avoid arbitration with Davis last season, agreeing to a one-year, $10.5 million deal. They will try to do the same this offseason, but whatever the number is, Oakland will happily pay it. Davis has earned every penny.
Mike Fiers - $9.7 million
Fiers earned $6 million in 2018, so this would represent more than a 60 percent raise for the right-hander. Whatever the number ends up being, the A's will have a hard time letting Fiers go, especially with all the injuries they are still dealing in their starting rotation.
Marcus Semien - $6.6 million
Semien put together a stellar all-around season, improving his defense tremendously. This number would be more than double his $3.125 million salary in 2018, but the A's will likely pay it.
Blake Treinen - $5.8 million
This is the no-brainer of all no-brainers. Treinen had one of the greatest seasons by any closer in baseball history, while earning just $2.15 million. The A's will pay whatever the number ends up being.
Sean Manaea - $3.8 million
Unfortunately, Manaea is expected to miss most, if not all of the 2019 season as he recovers from shoulder surgery. Nonetheless, the A's will keep their ace around and hope he comes back as strong ever.
Kendall Graveman - $2.5 million
Graveman underwent Tommy John surgery in August, meaning he won't be able to pitch until 2020, when he is 29 years old. The right-hander was Oakland's Opening Day starter this season but struggled right from the get-go. It may be time for the A's to part ways with Graveman.
Chris Hatcher - $2.4 million
Hatcher struggled in limited action this season. It would be hard to imagine him returning to Oakland.
Cory Gearrin - $2.4 million
The A's have a deep enough bullpen where they can probably let Gearrin walk for this number.
Liam Hendriks - $2.1 million
Despite a rough outing in the Wild Card Game, Hendriks was terrific in the month of September. The A's could very well bring him back for this number, which is just $200k more than his $1.9 million salary in 2018.
Mark Canha - $2.1 million
The A's have a crowded outfield, but Canha provided some serious power against left-handed pitching, while earning just $547,500. For just a shade over $2 million, he will likely be back next season.
Chris Bassitt - $1.6 million
Bassitt provided nice depth in the rotation when the A's were hit with the injury bug, but he spent most of the season in the minor leagues. He seems unlikely to be back for this number.
Ryan Buchter - $1.3 million
This would be a bargain for Buchter, who did a great job as Oakland's lone left-handed reliever for most of the season. He only earned $555k in his first season with the A's, making his 2.75 ERA even more impressive.
Josh Phegley - $1.2 million
Phegley proved more than capable of being a solid backup catcher. He earned $905k this past season, and a raise to $1.2 million seems reasonable.
Ryan Dull - $900k
Dull bounced up and down between the minors and majors, but primarily struggled at the big league level. He likely won't return.
Jake Smolinski - $800k
Smolinski was not a factor for the A's and is unlikely to return.