via NHL.com,

Ottawa Senators defenseman Jared Cowen will have a hearing with the NHL Department of Player Safety Wednesday for a hit on Buffalo Sabres center Zemgus Girgensons Tuesday night at First Niagara Center.

At 18:02 of the third period, Cowen came across the ice to hit Girgensons as he entered the Ottawa zone. No penalty was called on the play. Girgensons remained in the game.

The following grounds are being considered for supplemental discipline: illegal check to the head. However, the Department of Player Safety retains the right to make adjustments to the infraction upon review.

Also via NHL.com,

Tampa Bay Lightning right wing Richard Panik will have a hearing with the NHL Department of Player Safety Wednesday for a hit on Washington Capitals defenseman Karl Alzner Tuesday night at Verizon Center.

At 16:31 of the second period, Panik hit Alzner in the neutral zone, driving him into the boards. Alzner remained down briefly, but returned to the game in the third period. Panik was assessed a five-minute major for boarding on the play.

The following grounds are being considered for supplemental discipline: boarding. However, the Department of Player Safety retains the right to make adjustments to the infraction upon review.

added 9:37am, Below, scroll to the 1:15 mark to see the Cowen hit (first video) and the 2nd video is the Panik hit...