MOSCOW, Idaho (AP) -Idaho may be without star running back Deonte Jackson when it hosts No. 19 Hawaii on Saturday.

Jackson, a freshman who leads the Western Athletic Conference in rushing, suffered a high ankle sprain against Northern Illinois last weekend.

Jackson has gained 537 yards on 100 carries for the Vandals (1-3). If he is out, senior Jayson Bird will get more carries.

Bird had just 10 carries in Idaho's first three games, but got more action last Saturday when Jackson was hurt in the third quarter. Bird ran eight times for 52 yards and caught five passes for 72 yards.

Bird, who led Idaho in rushing as a freshman in 2004, has 1,536 career yards.