He has half of his six points in his last six games.
He's on injured reserve, and will be out at least a week.
Morrow's status is uncertain.
He also had an assist to earn his first two points in his second game as a member of the Blues.
The 34-year-old Morrow had six goals and eight assists in his final 15 regular-season games with Pittsburgh, which had acquired him from Dallas at the trade deadline. The Blues made the announcement Monday on their website.
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