The Bruins placed Bergeron (lower body) on injured reserve Saturday, Fluto Shinzawa of The Athletic reports.

The transaction opens a roster spot for Brett Ritchie's return following a six-game absence due to an infection. Bergeron has missed six straight games, and eight of the last 10, because of a lower-body injury. He skated Friday with a non-contact jersey, but there is no timeline for Bergeron's return.

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