CORVALLIS, Ore. -- Roberto Nelson tied a career high with 34 points as Oregon State pulled away from Chicago State in the second half Sunday for an 87-77 win.

Nelson scored 20 points in the second half and set a new career high with six 3-pointers. He has 12 3-pointers in the last three games.

Devon Collier added 25 points and eight rebounds for Oregon State (7-2).

Quinton Pippen had 13 points and seven rebounds for Chicago State (3-9).

Oregon State used a 7-0 run early in the second half to build on its eight-point halftime lead. Nelson scored the last five of that run at the free-throw line to put the Beavers up 57-41 with 15:46 left.

Nelson's third 3-pointer in about two minutes made it 68-47 with 11:53 remaining.

The Beavers led by as many as 23 in the second half, and Chicago State got no closer than 10.