Gunnarsson (lower body) was placed on injured reserve Tuesday, Tom Timmermann of the St. Louis Post-Dispatch reports.

The Blues have yet to release an expected timetable for Gunnarsson's return, but he'll miss St. Louis' next four games at a minimum now that he's been placed on IR. The 34-year-old blueliner has tallied two helpers in 12 games this season.

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