Saros will protect the road net in Sunday's preseason contest against Tampa Bay.
McMichael signed a six-year, $40.5 million contract with the Blues on Thursday.
Barron signed a one-year, $1.575 million contract with Nashville on Monday.
Gastrin was loaned to Brynas IF of the SHL on Monday.
Bradley signed a two-year, two-way contract with Nashville on Friday.
Skinner signed a one-year, two-way contract with the Predators on Wednesday, Brooks Bratten of the Predators' official site reports.
Ahcan agreed to terms on a two-year, two-way contract with Nashville on Wednesday, David Pagnotta of The Fourth Period reports.
Dube signed a one-year, $850,000 contract with the Blues on Wednesday.
Kerfoot penned a two-year, $7 million contract with Nashville on Wednesday, Darren Dreger of TSN reports.
Johnston signed a three-year, $6 million contract with the Blues on Wednesday, per Lou Korac of NHL.com.
