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 was mysteriously released by the Raiders on Thursday, which the team attributed to the way he was treating the rehab for a foot injury that kept him sidelined for most of last season. Las Vegas cut ties just one season into his five-year, $110 million pact.