The Boston Celtics pride themselves on a great development program. They can claim all of that because of how insane Jaylen Brown and Jayson Tatum became as the duo led them to the Larry O'Brien trophy in 2024. But the latter still has so much growth in him, and Al Horford knows that.

Boston Celtics' Jayson Tatum, left, drives past Orlando Magic's Anthony Black during the first half in game 1 of a first-round NBA playoff basketball series Sunday, April 20, 2025, in Boston. (AP Photo/Michael Dwyer) AP

In a series that forced the Celtics to shift away from their usual style, the Magic never solved the Tatum problem. He slammed the door on them with 35 points, 10 assists and eight rebounds in Game 5 after dominating crunch time of Game 4 in a 37-point-14-rebound outing.