Are Boston Celtics The Biggest Losers If Donovan Mitchell Joins Miami Heat?

The Boston Celtics have their strongest chance to win the NBA championship this season, facing a Jimmy Butler-less Miami Heat roster in Round 1 and a struggling Cleveland Cavaliers lineup in the Eastern Conference Semifinals. The Celtics' title window may close if they don't walk away victorious this year, due to a potential team-up of Butler and Cavaliers star Donovan Mitchell. Two of the league's best playoff risers joining forces in Miami pose a serious threat to Jayson Tatum and Co.