Getty Giannis Antetokounmpo #34 of the Milwaukee Bucks is defended by Jaylen Brown #7 of the Boston Celtics during a game at Fiserv Forum on November 10, 2024 in Milwaukee, Wisconsin. (Photo by Stacy Revere/Getty Images) If the Boston Celtics trade Jaylen Brown for Giannis Antetokounmpo , it’d be considered a huge upgrade — on paper, at least. However, The Ringer’s Bill Simmons worries that his beloved Celtics will be making a catastrophic mistake by swapping Brown — fresh off the best season