What happened: The 29-year-old defenseman said the June move to St. Louis felt like relief after a season in Toronto that he judged below his standard. St. Louis acquired Carlo on June 27 for two 2026 third-round picks to add a 6-foot-5 right-shot veteran to its blue line.
Why it matters: The Blues already cast the draft-week trade for Carlo as an experience play, using him to steady a defense group with younger options pushing for spots. He also enters 2026-27 on an expiring contract with a $4.1 million cap hit, making this season a useful read on whether the fit lasts beyond one year.
By the numbers: Carlo posted 10 assists in 75 games with Toronto, including seven in 55 games last season, while averaging just under 19.5 minutes per night. He is in the final season of a six-year, $24.6 million contract and is due a $3.25 million base salary in 2026-27.
What to watch: Training camp should show where Carlo slots into the Blues' top six and how much penalty-kill work he handles. His early usage will be the clearest sign of how much responsibility St. Louis expects him to carry.