McMichael signed a six-year, $40.5 million contract with the Blues on Thursday.
Hayton (upper body) signed a one-year, $4.775 million contract with Utah on Wednesday.
Gastrin was loaned to Brynas IF of the SHL on Monday.
Peeke signed a one-year, $1 million contract with the Mammoth on Friday, Chris Johnston of The Athletic reports.
Jones signed a two-year, two-way contract with the Mammoth on Wednesday.
Hayton (upper body) agreed to terms on an offer sheet from the Devils for a one-year, $4.775 million contract, Elliotte Friedman of Sportsnet reports Wednesday.
Lee signed a three-year, $16.2 million contract with the Mammoth on Wednesday, Elliotte Friedman of Sportsnet reports.
Trocheck was traded to the Mammoth from the Rangers on Wednesday in exchange for Sean Durzi, Cole Beaudoin and a 2027 third-round pick, Elliotte Friedman of Sportsnet reports.
Stenlund signed a one-year, $2.75 million contract with the Mammoth on Wednesday, Elliotte Friedman of Sportsnet reports.