The Dallas Cowboys could lose Tyron Smith for the remainder of the 2020 season.

Smith's neck injury flared up in practice following the Cowboys' season opener, and he missed the next two games before returning for Sunday's loss to the Cleveland Browns. But he has suffered a setback.

Smith is seeking a second opinion to find the best way to resolve the issue.

"He's further back than he was this time last week -- would be the best way to describe it," Mike McCarthy said.