PORTLAND, Ore. (AP) — It looked like Oklahoma had its game against Oregon State well in hand, but the Beavers were surprisingly resilient. Kristian Doolittle had 19 points and 16 rebounds, and the Sooners stretched their season-opening winning streak to three games with a 77-69 victory over the Beavers in the inaugural Phil Knight Invitational on Tuesday night. Down by as many as 20 points in…