Jayson Tatum used his time on the bench to learn

BOSTON, MASSACHUSETTS - SEPTEMBER 28: Jayson Tatum #0 of the Boston Celtics poses for photos during Boston Celtics Media Day at Auerbach Center on September 28, 2026 in Boston, Massachusetts. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Maddie Meyer/Getty Images) | Getty Images Jayson Tatum spent last season learning, learning about different