"That's kind of how I think we need to score some more goals, especially our bottom lines. We need to get more pucks to the net like that, create traffic and get rebounds and create a lot of havoc down there."
Karlsson said the Sharks need to play the way they did in the third period from the moment the puck drops Thursday.
"More [desperation], going to their net and crash the net, get pucks there," Karlsson said.
Karlsson was frustrated by the loss and by a penalty called against him at 2:28 of the second period for interference on Fehr. Evgeni Malkin scored a power-play goal nine seconds later, increasing Pittsburgh's lead to 2-0.
Karlsson didn't agree with the penalty.
"Maybe I held him up, but everyone does it," Karlsson said. "Then he fell. I don't know how he fell."
Karlsson had three shots and three hits. He was one of two Sharks, along with Spaling, with a positive rating at plus-1. But he found little solace in that, especially after Pittsburgh scored first for the fourth straight game and forced San Jose to play catch-up again.
"It's been like that the whole series," Karlsson said. "It's a little frustrating."