UPDATE: Miami's Gabe Vincent (ankle) will play; Celtics' Brogdon (forearm) out in Game 6

One of the key storylines tonight will be the impact of Gabe Vincent's return and the absence of Malcolm Brogdon, this year's Sixth Man of the Year.

MIAMI — When this Boston-Miami series began, there were a handful of players whose presence you knew would have a significant impact on the series’ outcome.

But Gabe Vincent?

To his credit, the soon-to-be free agent has made the most of this postseason by asserting himself as a key scoring threat both off the dribble as well as from 3-point range.

So whe…