The Panthers scored four goals on eight shots against Steve Mason in the first 6:46, a modern NHL record for the fastest four goals to start a season, according to Elias Sports Bureau.
Michal Neuvirth replaced Mason after the fourth goal and made 19 saves. Mark Streit scored a goal for the Flyers, who lost their second straight.
Jagr is the NHL's all-time leader in opening day points with 39. He has 13 goals and 26 assists.
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