In one of seven NHL games on Sunday, Aleksander Barkov scored twice while the Panthers erupted for five goals in the second period of their fourth straight win, 5-1 against the Ottawa Senators.
Frank Vatrano, Troy Brouwer and Jonathan Huberdeau also scored for Florida, and James Reimer made 33 saves.
The Panthers are now 6-5-1-2 on the season.
Ryan Dzingel scored, and Mike McKenna made 35 saves for Ottawa (7-8-3), which was also playing the second game of a back-to-back after defeating the Tampa Bay Lightning 6-4 on Saturday.