Trail Blazers 91, Bulls 74: Mo Williams scored 18 points off the bench as visiting Portland routed Chicago.

Damian Lillard added 16 points and LaMarcus Aldridge grabbed 13 rebounds for the Trail Blazers, who remain one game ahead of Golden State in the battle for fifth place in the Western Conference. Nicolas Batum and Robin Lopez added 13 points apiece.

Carlos Boozer had 16 points and 12 rebounds and D.J. Augustin scored 15 points for the Bulls, who dropped one game behind third-place Toronto in the Eastern Conference playoff race. Taj Gibson had 13 points and 10 rebounds and Joakim Noah contributed 11 points and 10 boards.

The Trail Blazers led by 15 entering the fourth quarter and Lillard scored five quick points and Williams followed with a jumper to make it 80-59 two minutes into the stanza. Four straight points by Wesley Matthews made it 89-67 with 3:56 remaining and Portland cruised to the finish.

Portland led 47-36 at the break and opened the second half with a 15-2 surge to boost the advantage to 24 points with 7:56 to go. The lead was again 24 later in the period before Chicago cut its deficit to 73-58 entering the fourth.

GAME NOTEBOOK: Aldridge scored just five points on 2-of-10 shooting in his second game since returning from a back injury. … The Bulls shot just 39.3 percent from the field, including 3-of-17 from 3-point range. … Portland has defeated Chicago six straight times.