Buffalo Bills restricted free agent center Ryan Groy received an offer sheet for a two-year contract for $5 million from the Los Angeles Rams, ESPN reported Tuesday.
The Bills have five days to match the offer, which includes $3.5 million in guaranteed money, according to ESPN's Adam Caplan.
Because Groy entered the NFL as an undrafted free agent, the Bills would not be entitled to draft-pick compensation if they chose not to match the offer.
The Bills gave Groy a tender worth $1.797 million.
Groy, who joined the Bills as a free agent during the 2015 season, appeared in all 16 games last year. He started the final seven games after Eric Wood suffered a broken leg against the Seattle Seahawks.
Groy started three games as a rookie with the Chicago Bears in 2014 before being traded to the New England Patriots right before the 2015 season.
After being released by the Patriots, the Tampa Bay Buccaneers signed him to their practice squad.
If he joined the Rams, Groy would be reunited with Aaron Kromer, the team's new offensive line coach who guided the Bills' offensive line the past two seasons. Kromer also was offensive coordinator of the Bears during Groy's rookie year.