FLAGSTAFF, Ariz. -- Kris Yanku converted eight straight free throws in the final two minutes as Northern Arizona held off Southern Utah, 64-57 Saturday night.

Trey Kennedy's layup with 5:13 left pulled the Thunderbirds, winless in Big Sky Conference play, even at 49-49, but Northern Arizona (10-13, 7-5 Big Sky) closed with a 15-8 run to earn the victory.

Quinton Upsher scored 20 points and Aaseem Dixon added another 16 for the Lumberjacks, and Gaellan Bewernick grabbed a season-high 12 rebounds, topping his record 11 boards set at Texas-San Antonio in November.

The Lumberjacks outrebounded Southern Utah 35-26 and pulled down 11 offensive rebounds.

Northern Arizona now leads the all-time series with Southern Utah, 15-10 and is 11-3 in games played at Flagstaff.

John Marshall scored 10 points for Southern Utah (1-19, 0-11), but was the only Thunderbird to reach double-figure scoring.