Selected by the Anaheim Ducks in the second round (No. 35) of the 1996 NHL Draft, Cullen had 731 points (266 goals, 465 assists) in 1,516 NHL games with the Ducks, Florida Panthers, Carolina Hurricanes, New York Rangers, Ottawa Senators, Minnesota Wild, Nashville Predators and Penguins. He had 58 points (19 goals, 39 assists) in 132 playoff games and also won the Stanley Cup in 2006 with the Hurricanes.
"'Cully' was a cerebral player with great leadership skills," Sullivan said. "He is a natural coach who will offer great insight to our coaching staff and to our players. We look forward to adding him to our staff."
In 225 regular-season games with the Penguins, Cullen had 83 points (36 goals, 47 assists). He was an alternate captain in each of his three seasons.