The St. Louis Blues defenseman knew immediately what the big Bruins captain was feeling.
"I've felt the same thing," Dunn said. "At first, you don't really know what's happened, it's just a shock to your face. You look down and you see blood in your hands. You feel kind of helpless."
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Chara's availability for Game 5 of the Stanley Cup Final at Boston on Thursday (8 p.m. ET; NBC, CBC, SN, TVAS) is unclear because of the facial injury he sustained in the second period of Game 4 on Monday.
Dunn, though, will be in the Blues lineup for the second straight game even though he can barely crack a smile and can't eat hard foods. It's an interesting plot twist in a Cup Final that has had plenty already.
"I'm just happy to be back in the lineup," Dunn said. "It's not easy watching so just happy to be a part of this team and happy to get that first game in."
Dunn sustained his facial injury in the first period of Game 3 of the Western Conference Final against the San Jose Sharks on May 15, when he was hit in the jaw by a shot from Sharks defenseman Brenden Dillon.
He didn't play again until Monday, when he had an assist and a team-high nine shot attempts in 12:57 of ice time to help the Blues even the best-of-7 series with a 4-2 win.
Dunn said he will need a lot of dental work soon, but for now, his mouth is filled with metal wires that make it feel like he's wearing a mouthguard all the time.
"I can smile a little bit, it's just uncomfortable, there's a lot of things in there," Dunn said. "Eating is tough, too. Everything is really tough."
The good news is being the smooth-skating, puck-moving defenseman the Blues need him to be isn't tough for Dunn right now.
He was both of those things in Game 4 and he made a difference despite playing 20 shifts, second fewest among Blues defensemen to Joel Edmundson (13), who likely will be scratched in favor of Robert Bortuzzo in Game 5.