Brenden Morrow added his first playoff goal in more than five years, Tomas Vokoun made 19 saves and the Penguins rode their superstar captain to their fourth straight victory.
Crosby beat Craig Anderson three times in the game's first 22 minutes, sending the goalie to the bench after stopping 18 of 21 shots.
Kyle Turris, Colin Greening and Jean-Gabriel Pageau scored for the Senators, but couldn't stop Ottawa from falling into a deep hole against the Eastern Conference's top seed. The Senators have never won a playoff series after dropping the first two games.
That's today's game. That's one of the things you have to deal with when you're a championship team. Guys are going to earn more money based on their performance and what they've achieved, [and] deservedly so. [Saad] falls into that category.
— Blackhawks coach Joel Quenneville on Brandon Saad, who was traded by Chicago to the Columbus Blue Jackets this offseason