Olli Jokinen scored two goals in regulation; Sean Hill scored a goal; Horton and Nieuwendyk each had two assists; and goaltender Roberto Luongo made 33 saves for the Panthers (17-22-6), who broke a three-game road losing streak and improved to 1-2 in shoot-outs.
Florida out-shot Washington, 45-39. The Panthers were 2-for-7 on the power play. The Capitals went 2-for-9.
Washington fell to 5-3 in shoot-outs.
Justin Bieber crashes Drake Bell's album release party
Rosie O'Donnell unveils nearly 50-pound weight loss