Penguins' Crosby out of game four with concussion

Updated: 

Sidney Crosby will miss game four of the Pittsburgh Penguins' playoff series with the Washington Capitals on Wednesday after being diagnosed with a concussion.

Crosby, who was hit with high cross-check from Capitals defenseman Matt Niskanen in Monday's game three loss, was at the Penguins' facility but did not participate in practice on Tuesday.

He will be evaluated again following Wednesday's game.

Given Crosby's history of head and neck injuries, the Penguins are expected to use caution when proceeding with their captain's concussion. 

The 29-year-old superstar, who was named a finalist for the Hart Trophy on Monday, has missed dozens of games due to post-concussion syndrome in 2011 and two fractured vertebrae in his neck in 2012.

Barely five minutes into the first period, Crosby was cutting across the Capitals' goal crease and fell to the ice when Niskanen made contact.

Crosby needed to be helped off the ice to the Penguins' locker room for evaluation and did not return to the game.

Niskanen was assessed a five-minute major penalty and game misconduct for cross-checking, though it was reported on Tuesday that he will not be subject to suspension for the headshot.

The Penguins additionally announced the loss of forward Conor Sheary, who was also diagnosed with a concussion after colliding with teammate Patric Hornqvist during Monday's game.

Pittsburgh hold a 2-1 lead in the second-round series after Washington's overtime victory in game three.