Holloway will officially sign with the Blues on a two-year, $4.58 million contract after the Oilers opted not to match the offer Tuesday.
Holloway is far from a lock for the Opening Night lineup. He figures to be in a battle for ice time with Mathieu Joseph and Kasperi Kapanen but should at least have the opportunity to make an impression during training camp. In his 38 NHL appearances last year, the 22-year-old Holloway showed flashes of his offensive game, recording six goals and three assists while also dishing out 90 hits.