By Madison Williams Tatum decided to keep the ball for himself instead of passing it to Williams. In the Celtics 129-106 win over the Nets on Thursday night, Jayson Tatum decided to dunk the ball instead of passing it to his teammate, Grant Williams. Tatum and Williams had a two-on-one fast break in the fourth quarter, which caused Williams to look at his teammate and point to the sky. Regardless, Tatum didn’t change his mind on where the ball was going. In his post-game press conference, Tatum was asked why he didn’t give Williams the ball after he signaled for the alley-oop. This caused the …