The forward, who has seven points (five goals, two assists) in his past six games, had 96 points (52 goals and 44 assists) for Washington in three seasons from 2016-19 and helped the Capitals win their first Stanley Cup championship in 2018. He signed a four-year contract with the Panthers on July 1 and leads them with 11 goals.
Florida has lost two straight games after going 5-1-0 in its previous six.
The Capitals have scored two goals during a two-game winless streak (0-1-1) after outscoring their opponents 67-46 while going 13-1-2 in their previous 16 games.