Nearly five minutes into the contest, the Cleveland Cavaliers guard attacked the rim after splitting two defenders at the top of the key.

Mitchell drove to the rim, jumped up, and put Celtics forward Kristaps Porziņģis on a poster with a highlight jam. The best part of this play was watching Mitchell's Cavaliers teammates react to the dunk.

A matchup of the two best teams in the East featured one of the dunks of the year Tuesday night. This was bad news for Kristaps Porziņģis. Donovan Mitchell put Porziņģis on a poster with a power slam over the 7-2 center early Tuesday to ignite the Cleveland home crowd in a matchup against the Boston Celtics.

Mitchell, a former NBA Slam Dunk champion, put a jolt into the arena with a thunderous poster slam over Celtics center Kristaps Porzingis, who already had two blocks in the contest.

Cleveland Cavaliers fans got a sneak peek today at a new, exclusive bobblehead. Donovan "Spida" Mitchell, the Cavs shooting guard, showed off the new collectible created in his honor, as a dunk he scored last season during the playoffs has become a commemorative bobblehead.

Donovan Mitchell just threw down one of the biggest dunks in years for the Cavs during Tuesday night's game against the Celtics.