Bills coach Sean McDermott said the Bills are still deciding what to do with backup running back Mike Gillislee. (Harry Scull Jr./Buffalo News)

Although he's still listed on their roster, Mike Gillislee wasn't at the Buffalo Bills' voluntary minicamp Thursday.

That's because he might not be their property much longer. Gillislee signed an offer sheet Wednesday with the New England Patriots as a restricted free agent, leaving the Bills with a decision about whether they want to match the terms and retain him, or allow him to leave and receive a fifth-round draft pick in return.

"You know, Mike's a good football player, right? And we understand that," coach Sean McDermott said. "We're still going through the process of evaluating that offer sheet, and in a couple days, we'll have a decision."

The Bills have until Monday to make that call. The Patriots' offer is reportedly for two years and $6.4 million, with $4 million in the first year. The Bills last year elected not to match the contract offer to wide receiver Chris Hogan, allowing him to sign with New England as a restricted free agent.

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