PROVO, Utah (AP) - Cody Vaz insists he isn't nervous, even if the hopes of No. 10 Oregon State ride on him, a quarterback who hasn't started a game since he was in high school.

Beavers coach Mike Riley says the junior, who steps in for the injured Sean Mannion when Oregon State visits BYU on Saturday, is a good quarterback who has been preparing for this for a long time and will be good.

Brigham Young also is dealing with quarterback issues.

The Cougars are expected to start senior Riley Nelson, back after missing the previous two games with what he said were ``back fractures.''

While BYU coach Bronco Mendenhall said Nelson was on track to start this week anyway, there wasn't much choice after talented freshman Taysom Hill tore up his left knee last week.