Saturday's game will be the first as members of the Mountain West and the first since the Aggies program evolved from perennial cellar dweller to a team that went 11-2 a year ago, beat Toledo in the Idaho Potato Bowl and finished ranked No. 18 in the AP Top 25.
Keeton was a key cog in Utah State's rebound last year and this year had thrown for 1,388 yards, 18 TDs and just two interceptions. He also came into last weekend's game ranked second in the nation in points responsible for, with 120. Keeton's backup is Craig Harrison, who completed 18 of 41 passes for 185 yards and one TD in the loss to BYU.
Boise State is coming off a bye week, giving coaches and players an extra week to prepare for the Aggies. Petersen played down Keeton's loss Monday, focusing his concerns instead on Utah State's stout and stingy defense.
The Aggies are tops in the conference in a handful of key defensive categories, including fewest rushing yards allowed (132.2) and scoring, giving up just 19.1 points per game.
"The last game got away from them a little bit," Petersen said. "But ... it was really a couple of plays here and there. Probably with the injury to the quarterback it was a little unsettling for everyone. But like any good team, they've got good players and losing one guy is not going to sink them."
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