Anderson, whose contract runs through the 2019-20 season, said he hasn't spoken to Karlsson this offseason, focusing instead on his family.
"We've been in Florida and I've pretty much stayed away," said Anderson, who went 23-25-6 with a 3.32 goals-against average and .898 save percentage last season for the Senators, who finished with the second-worst record in the NHL (28-43-11, 67 points) one season after reaching the Eastern Conference Final. "I've got two kids with three activity sports each, and they just started school two weeks ago, so it has been one of the times where it is nice to get away from everything."
He was sure to get to the Stars & Stripes Showdown on Sunday, a charity game in honor of USA Hockey executive Jim Johannson, who died in January at 53.
"Whenever you played for USA Hockey, JJ was the point man, and whenever you needed anything, he took care of it," Anderson said. "When we were asking to come to Plymouth to honor it, it was really a no-brainer for all of these guys."
Anderson, who gave up four goals in his one period, got more out of the game than a good workout.
"For me, this is a good learning experience," he said. "I'm going up against a lot of great scorers, and I'm able to watch them and keep track of what tricks they've got up their sleeves. That might help somewhere down the line."