Rieder was placed in the NHL's COVID-19 protocol Wednesday, Mike Harrington of The Buffalo News reports.
EDGE Analysis
Per Paul Hamilton of WGR Sports Radio 550, all Sabres players and staff are in quarantine until Monday, as Rieder was the fourth player placed in the protocol. The 28-year-old has three goals through 10 games this season and is considered questionable for next Thursday's game against Washington.