Bills head coach Sean McDermott said that Prater has been ruled out for Sunday's game against the Browns due to a right quadriceps injury, Jay Skurski of The Buffalo News reports.
Prater suffered the injury during the Bills' 35-31 win over the Patriots on Sunday, when he converted all five of his extra-point attempts. With Tyler Bass (hip) already done for the season, the Bills will have to pursue a free-agent kicker to hold down the fort for the duration of Prater's recovery. Sal Capaccio of WGR Sports Radio 550 Buffalo relays that Prater is considered week-to-week and could miss more than one game.