Gardiner (undisclosed) was placed on injured reserve Friday, Jonas Siegel of TSN Radio 1050 reports.

EDGE Analysis

It's still unclear exactly what is ailing Gardiner, but the defenseman was held out of Wednesday's contest against the Sabres with the setback. He'll now be sidelined for at least the next week, though the 25-year-old has no established timetable as of now.