Matthew Tkachuk hustled back and ended up saving a goal giving the Panthers another chance at scoring a goal to tie it up, but OEL gave up on the play and lead to McDavid scoring an empty net goal to seal the deal.
The game could have had a different outcome if Ekman-Larrson didn't completely give up on the play, the Panthers could've possibly tied it up, but that just goes to show playing in the Finals it takes a full team effort.