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The new and improved Matt Cooke:
February 9, 2011, Cooke was given a four-game suspension for a hit from behind on Columbus Blue Jackets' defenseman Fedor Tyutin.[21]

March 21, Cooke was suspended for the final ten games of the Penguins regular season schedule as well as the first round of the 2011 Stanley Cup playoffs stemming from an elbow to the head of New York Rangers defenseman Ryan McDonagh.

February 2013, Cooke was involved in an incident with against the Ottawa Senators in which Erik Karlsson's achilles tendon was cut by Cooke's skate as the two made contact along the boards. While Senators owner Eugene Melnyk was outraged by the incident, stating "To have him (Karlsson) taken out by a goon is unconscionable", league officials determined there would be no supplemental discipline for Cooke.

April 21, 2014, during game 3 of the first round finals against the Colorado Avalanche, Cooke delivered a knee-on-knee check to Avalanche defenseman Tyson Barrie. Barrie did not return to the game and it was announced that he would miss 4–6 weeks as a result of the Cooke check. After an in-person hearing with the Department of Player Safety, Cooke was suspended for 7 games.