Oregon State quarterback Sean Mannion passed for 328 yards and one touchdown and rushed for another score Saturday to pace the Beavers to a 29-14 victory over Portland State.
Trailing 14-13 at halftime, Oregon State forced turnovers on five of Portland State's first six possessions of the second half and took the lead for good on Garrett Owen's 26-yard field goal with 10:58 to play in the third quarter.
Owens added field goals of 25, 25, 31 and 23 yards to help the Beavers of the Pacific-12Conference avoid a season-opening loss at home to a FCS school for the third time in four seasons.
Oregon State's Storm Woods had 16 carries for 126 yards rushing. The Beavers finished with 505 yards total offense to Portland State's 215.
Portland State backup quarterback Paris Penn finished with nine carries for 112 yards and two touchdowns for the Vikings of the Big Sky conference, who managed only 40 yards offense in the second half.