Penguins star Sidney Crosby diagnosed with concussion, out for Game 4

Penguins centre Sidney Crosby (87) takes a hit from Capitals defenceman Matt Niskanen during the first period of Game 3 of their NHL Eastern Conference semifinal series in Pittsburgh on Monday, May 1, 2017. Crosby left the game and did not return. (Gene J. Puskar/AP Photo)Pittsburgh coach Mike Sullivan says star forward Sidney Crosby has been diagnosed with a concussion and will miss Game 4 of the Penguins’ Eastern Conference semifinal series with Washington on Wednesday.

Crosby left Monday’s game after being cross-checked in the face by Capitals defenceman Matt Niskanen.

“Sid has been diagnosed with a concussion. He will be out for tomorrow’s game,” Sullivan said. “We will evaluate him from…