Jayson Tatum’s Achilles injury could end the Celtics’ dynasty and reshape the entire NBA landscape. MORE NBA CONTENT: https://www.youtube.com/watch?v=amBdHSptn4o&list=PL5o65YXJ-5PST3vGqwWCr6ZRhkBpOt4fa&ab_channel=AthlonSports The NBA world is reeling after the Boston Celtics confirmed that All-Star forward Jayson Tatum underwent surgery for a torn Achilles.…