POCATELLO, Idaho (AP) -- A 28-point third-quarter burst -- including two long fumble returns for touchdowns -- gave Idaho State a 38-20 win over Portland State on Saturday.
Trailing 10-3 after halftime, ISU defensive tackle Micah Cloward picked up a fumble and ran it 65 yards for a touchdown less than four minutes into the third quarter.
Two-and-a-half minutes later, Bengal linebacker Sterling Mennear picked up another fumble and ran it in 76 yards to give ISU a 17-10 lead.
The last score of the quarter was a 2-yard run by ISU fullback Clint Knickrehm.
Although Portland State (2-5, 2-2 Big Sky) gained 409 yards of total offense, the ISU (3-4, 2-3) defense recorded nine sacks and forced six turnovers, including five fumble recoveries and one interception.
PSU's other touchdown was scored on a 30-yard interception return by linebacker KJ McCrae in the first quarter.
Bengals cornerback D.J. Clark had an end-zone interception that thwarted a Viking fourth-quarter drive.
ISU senior running back Josh Barnett became the Bengals' all-time leader in rushing attempts with 598 in his career. The previous record of 591 was held by Merril Hoge (1983-86).
Barnett, who had 18 carries for 139 yards and one touchdown, now needs 294 yards to become ISU's all-time rushing yards leader.