WALTHAM, MA- JUNE 23: Wyc Grousbeck of the Boston Celtics talks with the media as he introduced Jayson Tatum #11 of the Boston Celtics during a introductory press conference on June 23 in Waltham, 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. Mandatory Copyright Notice: Copyright 2017 NBAE (Photo by Chris Marion/NBAE via Getty Images)