The power forward scored more than 10 points for the first time since being traded to the team during the off-season, adding 18 during the 106-98 victory.
The head coach told reporters: "Our starters played fantastic at the start of the game and got us out to a huge lead. In the second half it was our bench that got us back out to the lead. Kris was a big part of that.
"He's done a good job for us. I think that speaks to his professionalism, too, because this hasn't always been easy for him. But he's been a pro about everything."
Humphries has struggled to find a place in the team since moving to Boston, remaining on the bench for five games so far this season.