Matt Niskanen scored the game winner Sunday.
Matt Niskanen (lower body) will return to action on Tuesday night.
Matt Niskanen (lower body) will miss Saturday's contest.
Matt Niskanen (lower body) won't play Friday against the Oilers.
Matt Niskanen's lower-body injury might be to his left leg.
Matt Niskanen is day-to-day with a lower-body injury, per Capitals GM Brian MacLellan.
Capitals coach Barry Trotz doesn't think Matt Niskanen's lower-body injury is serious.
Matt Niskanen exited Wednesday's game against Philadelphia because of a lower-body injury.
Matt Niskanen added a helper to his ledger in Saturday's 3-2 win over Montreal.
Matt Niskanen doubled his season's goal total during Sunday's 5-0 win over the Flyers.
Matt Niskanen collected a pair of assists during Saturday's 6-2 win over the Devils on Saturday.
Matt Niskanen scored two goals in Tuesday's 4-2 win over the New York Islanders.
Matt Niskanen will indeed return to the Capitals' blue line on Sunday.
Matt Niskanen practiced fully on Saturday and could return as early as Sunday from his suspected concussion.