Neither Chris Plys nor Joe Polo was able to experience the on-ice feeling of winning Olympic gold in 2018, but both have been unbeatable at the USA Curling Mixed Doubles National Championships in Seattle.

Plys, the Duluthian who joined John Shuster's gold-medal winning team after the 2018 Winter Games, improved to 4-0 in Pool A with partner Vicky Persinger by beating Taylor Anderson and Derrick McLean 9-3.

Polo, the Duluth alternate who didn't play on Shuster's golden team, is 5-0 in Pool B with teammate Tabitha Peterson after a pair of victories Friday at the Granite Curling Club.

Shuster and fellow Duluth Curling Club member Cory Christensen entered Friday night's play at 3-1 in Pool A after edging Duluth's Korey Dropkin and teammate Sarah Anderson in the afternoon. Dropkin and Anderson were also 3-1 entering the final round-robin draw and already had qualified for today's playoffs.

• Hibbing's Paul Pustovar, the 2010 world seniors champion, advanced at the U.S. Senior Men's National Championship in Mapleton, Minn., with a 6-4 win over 2017 U.S. champ Mike Farbelow. Pustovar and Geoff Goodland meet this morning to determine the top seed in the playoffs.

Superior's Phil DeVore remained alive for a playoff berth with a 9-1 win over Dave Foley and a 7-1 victory over Gert Messing.

• The Senior Women's National Championship kicked off in Portage, Wis., where defending champion Margie Smith, whose team includes Silver Bay's Norma O'Leary, won twice in dominating fashion. Also winning two matches was Patti Lank's rink, which includes Duluth's Linda Christensen.