Gerard Gallant downplayed Vegas’ latest win against his old team, but Jonathan Marchessault — who played under Gallant with Florida — made it clear how important it was. Erik Haula scored the go-ahead goal in the third period and the host Golden Knights beat the Panthers 5-2 Sunday. Marchessault said the team wanted to win for Gallant, who they affectionately call “Turk,” who was fired just over a year ago by Florida after a loss at Carolina.