Faulk's absence came hours after goaltender Jordan Binnington went into protocol and put the Blues in a tough spot because of salary cap constraints. General manager Doug Armstrong said Binnington tested positive for the coronavirus.
"You don't like to hear that news," coach Craig Berube said on a video call. "We just move on, boys. That's all we can do. ... It's just another road block, we just got to get through it."
It was not immediately clear if either Binnington or Faulk had any symptoms.
St. Louis plans to recall goalie Charlie Lindgren on Friday, but could not do so in time for the game against Tampa Bay. League rules stipulate that because the Blues don't have the cap room to add another player to the roster, they had to get through one game with an emergency backup.
Binnington, who backstopped the Blues to their first Stanley Cup title in 2019, is 8-5-3 with a 2.80 goals-against average and .912 save percentage in 16 starts this season. The 28-year-old is also a leading candidate to be one of Canada's goalies at the upcoming Olympics in Beijing, assuming the NHL does not withdraw.
Husso is expected to get the lion's share of duties in the net while Binnington is out. Entering Thursday, the 26-year-old Finn was 3-1-0 with a 1.76 GAA and .936 save percentage in limited action this season.
Berube saw a change in Husso's approach last season and thinks he's ready for the opportunity.
"I believe he's in a better place," Berube said. "It's obviously new for him to handle the load. But I'm going off his play this year so far and he's played extremely well."
Faulk, 29, has 10 points in 22 games this season.