Houser (COVID-19 protocols) was placed on waivers Wednesday, per Elliotte Friedman of Sportsnet.
Houser was competent in his most recent NHL appearance, stopping 30 of 33 shots on net in a 6-3 victory over Philadelphia on Jan. 22. Per NHL rules, the 29-year-old had to have cleared the league's virus protocols before being placed on waivers. He signed a one-year deal with the Sabres on Jan. 12 and could be reassigned to their AHL affiliate if he goes unclaimed.