Karlsson finished with a goal and two assists to set a new franchise record for assists by a defenseman in a season with 47.
The 21-year-old now has seven points in his last two games. His 60 points on the season give him a 20-point lead on Florida's Brian Campbell for the NHL lead in scoring by a defenseman.
Michalek added two goals and an assist, while Chris Phillips, with his fourth goal in six games, also scored for Ottawa. Craig Anderson made 33 saves.
Copyright 2012 The Associated Press. All rights reserved. This
material may not be published, broadcast, rewritten or