As the Raiders and former Raiders defensive tackle Christian Wilkins embark on a legal fight over whether the team properly voided his remaining guarantees before cutting him, one key question will be whether his foot injury required another surgery — and whether he should have submitted to it.

Wilkins, 29, was the Raiders’ marquee free-agent signing last year. Las Vegas is reportedly voiding the remaining $35.25 million of his deal, though he has filed a grievance with the NFL Players Association.