Prater (knee) has been deemed questionable for Sunday's game at San Francisco, Josh Weinfuss of ESPN.com reports.
A left knee issue kept Prater out of practice both Wednesday and Thursday, but he was able to return to a limited session Friday. Head coach Jonathan Gannon said before Friday's practice that the veteran kicker is "doing pretty good," per Howard Balzer of USA Today, but it's not yet clear if Prater will be able to suit up Sunday. If he isn't healthy enough to play, Chad Ryland will likely be brought in from the practice squad to kick Sunday.