New York won its third in a row and its second in as many nights in California. The Rangers wrap up a three-game sweep through the state Saturday in San Jose.
Backup goaltender Steve Valiquette made 36 saves to get the win, boosting his record to 4-2 this season.
Rozsival gave New York a 2-1 lead midway through the second period with a power-play goal, but Valiquette surrendered a score on Dustin Brown's wrist shot 2:27 into the third.
Jason LaBarbera gave up three goals on 26 shots to take the loss.