The forward was disciplined for boarding Lightning forward Blake Coleman at 11:45 of the third period in Tampa Bay's 5-4 win in Game 1 on Sunday. Bennett received a minor penalty for charging at 12:19. Coleman remained in the game.
"It's what it is and we're going to deal with it and learn and move forward," Panthers coach Joel Quenneville said Tuesday. "[The NHL] raised our antenna up right when it happened after the game. We looked at it and we said we'll see how it all plays out. We let them do their thing and we'll go from there."
Bennett had two assists, three hits, three blocked shots and four shots on goal in Game 1.
He scored 27 points (10 goals, 17 assists) in 48 games this season, including 15 points (six goals, nine assists) in 10 games after he was acquired in a trade with the Calgary Flames on April 12
NHL.com senior writer Dan Rosen contributed to this report