Holl was traded to St. Louis, along with Dmitri Buchelnikov and a 2026 first-round and 2026 third-round pick, from Detroit on Friday in exchange for Justin Faulk.
Holl appeared in 73 games for the Red Wings last season, notching eight points, but hasn't been able to break into the lineup this year. With AHL Grand Rapids, the blueliner has produced two goals and 12 helpers in 41 contests. Per the NHL media site, Holl will start his time with the Blues on the NHL roster.