Tight end Trey Burton played an integral role in the Eagles' Super Bowl LII victory over the New England Patriots, tossing a historic touchdown pass to Nick Foles on the "Philly Special" play, but he could play elsewhere in 2018.

The Eagles have made an offer that Burton "didn't consider serious," and unless the offer is sweetened, Burton likely will sign with another team, a person with knowledge of the negotiations told NJ Advance Media.

The Eagles are roughly $9.6 million above the salary cap, heading into free agency. Burton could be the top tight end available, so, it could be difficult for the Eagles to retain him.

"We are fully expecting Trey to sign elsewhere," said the person, who requested anonymity because the person was not authorized to speak publicly about the contract talks.