Shani Davis finished fifth in his two best events, missing the podium at the World Single Distance Championships for the first time in his career.
Davis, a two-time Olympic 1000m champion and two-time 1500m silver medalist, finished 2.36 seconds behind Russian winner Denis Yuskov in the 1500m on Friday in Kolomna, Russia.
On Saturday, Davis was .68 behind Russian winner Pavel Kulizhnikov in the 1000m.
Davis, 33, is the world-record holder in both events and won a surprise World 1000m title last season, after contemplating retirement during a campaign in which he had one World Cup podium finish (a third place).