The flip side, of course, is the Penguins have Sidney Crosby, Evgeni Malkin and Phil Kessel, and the Senators do not, but former NHL goaltending coach Jim Corsi said Karlsson has the ability to turn Pittsburgh from a team that plays on its toes most of the time, a team that pushes and attacks through the neutral zone, into a team that has no choice but to play on its heels.
That, more than anything from Ottawa's perspective, could be the great equalizer in the Eastern Conference Final.
\[RELATED: Complete Senators vs. Penguins series coverage\]
Karlsson did that to the Boston Bruins in the first round and the New York Rangers in the second round. If he can do it to the Penguins, starting with Game 1 at PPG Paints Arena on Saturday (7 p.m. ET; NBC, SN, CBC, TVA Sports), the Senators could wind up playing for the Stanley Cup.
"If you have a defenseman who can move the puck and get it into the hands of the forwards as quickly as possible, that's a dangerous thing," Corsi said. "If you have a defenseman who can move the puck and join the offense the way Karlsson does, that keeps the opposition's offense thinking. There's a little bit of tentativeness there."
Senators coach Guy Boucher said he won't be too concerned about matchups, at least not at the start of the series, but Karlsson should see plenty of ice time against Crosby and against Malkin.
That theoretically should put the Senators in a good position to limit each.
"That's the beauty of having a guy like Karlsson, he's a guy that's behind the front three guys, so the strategy would be basically get the puck into the neutral zone and get it into Karlsson's hands as quickly as possible," Corsi said. "Suddenly, the guys that are playing on their toes going one way, they have to question, 'Do we play with reckless abandon, or do we play a more defensive game?' The guys that police the forwards are defensemen, but in Karlsson's case he's like a forward, and it puts a lot of pressure on the opposition.