Everyone is raving about Grant Williams +/- and for good reason. When he's on the court he's doing the things that simply help a team win. It's only been four games, but Williams has I pressed in all four. The knocks on him when he was drafted was he might not be athletic and long enough and can he stretch his game out to the perimeter in the NBA. He's only been a Celtic for three weeks, but the answer to the last question is a resounding yes.
Williams has not only not been afraid to shoot the 3 ball, but he's hitting them. He's also done a solid job creating offense for others, which will be beneficial for the Celtics, as they lost their only big in Al Horford who could do that last season. It's only summer league, but I'd be very surprised if Grant isn't getting rotation minutes before December.