Jake Allen made 30 saves, Vladimir Tarasenko scored twice and St. Louis beat the Ottawa Senators 6-0 on Tuesday night.
Magnus Paajarvi, Patrik Berglund, Alexander Steen and Ivan Barbashev also scored for the Blues (27-22-5), who have won three of four. Paul Stastny and David Perron added two assists apiece.
St. Louis shut out Philadelphia 2-0 on Monday night behind Carter Hutton's 26 saves, but Yeo opted for Allen against the Senators and he responded with his second shutout of the season.
Much of the crowd headed for the exits after St. Louis made it 4-0 midway through the third on Steen's 11th of the season off his own rebound after a Mike Hoffman giveaway. Minutes later Tarasenko scored his second and Barbashev made it 6-0 on yet another giveaway.
St. Louis jumped in front with two goals in the second. Paajarvi beat Hammond for his second of the season at 1:51, and Tarasenko used a great pass from Paul Stastny to make it 2-0 at 6:46.
Berglund jumped on a rebound for an early power-play goal in the third. The Senators challenged the play, arguing the Blues were offside, but the review was inconclusive.
The Blues visit Toronto on Thursday night.