The Pittsburgh Penguins fired coach Mike Sullivan, who won back-to-back Stanley Cup titles in his first two seasons, the team announced Monday.

Sometimes the class needs a new professor,” said Penguins' General Manager Kyle Dubas. “And sometimes the professor needs a new class.”

The decision ends a fantastic run by Sullivan, who was hired by the franchise during the 2015-16 season after it fired Mike Johnston. In Sullivan's first year with the team, the Penguins won the Stanley Cup. They did it again the following year, giving Sullivan two championships in his first two seasons with the franchise.