Taijuan Walker requested $2.6 million and was offered $2.25 million by the Diamondbacks when arbitration figures were exchanged on Friday.
Taijuan Walker said Thursday that he was dealing with 10 bone spurs in his right foot this past season.
Diamondbacks acquired RHP Taijuan Walker and SS Ketel Marte from the Mariners for 2B Jean Segura, OF Mitch Haniger and LHP Zac Curtis.
Taijuan Walker underwent arthroscopic surgery Monday to remove a bone fragment from his right ankle.
Taijuan Walker is mulling offseason surgery on his right foot.
Taijuan Walker limited the A's to one run and two hits in six innings Friday.
Taijuan Walker surrendered three runs in 5 1/3 innings Monday in a loss to the Blue Jays.
Taijuan Walker was superb in Tuesday's complete game, 8-0 win over the Angels and did not allow a hit until the seventh inning.
Taijuan Walker turned in a forgettable start in Thursday's win over the Rangers, allowing three runs on seven hits over five innings.
Taijuan Walker couldn't even make it through the first inning, getting pounded for six runs -- including three consecutive home runs -- in a loss to the Angels on Saturday.
Taijuan Walker yielded four earned runs over 7 1/3 innings Sunday in a loss to the White Sox.
Making his return to the big league mound in Tuesday's loss to the Yankees, Taijuan Walker allowed four runs (three earned) on six hits over 5 2/3 innings.
Mariners recalled RHP Taijuan Walker from Triple-A Tacoma.
Taijuan Walker is expected to be recalled from Triple-A Tacoma to start Tuesday against the Yankees.