May 15 (UPI) -- Bruins winger Chris Wagner returned to Boston for additional tests on his injured right arm and will miss Game 4 of the Eastern Conference finals against the Carolina Hurricanes.
"He returned to Boston to get further tests, so he's ruled out [Thursday]," Cassidy said. "Noel Acciari will go in his spot and from there we'll sort it out once we get back to Boston."
Wagner suffered the injury while blocking a slap shot from Hurricanes defenseman Justin Faulk in the third period of the Bruins' 2-1 win Tuesday night. The fourth-line forward, who scored a goal in Game 3, had his arm in a sling after the contest.
"You never want to see injuries like that, but that's a testament to him and what he's willing to give for this team and block a shot like that," Bruins forward Charlie Coyle told reporters. "That gets us fired up. It's the little things. They add up. That's a big loss for us."
Acciari previously was sidelined with an upper-body injury but was declared available earlier in the week. He is expected to join Sean Kuraly and Joakim Nordstrom on the Bruins' fourth line.
Game 4 is Thursday night at PNC Arena in Raleigh, N.C. The Bruins hold a 3-0 series lead over the Hurricanes.