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FORT COLLINS, COLO. (AP) -- Boise State hasn't even made its Mountain West debut and already the Broncos are the class of the conference.

With Air Force and TCU stumbling this season, the fifth-ranked Broncos (5-0) bring some much needed cache to a league that lost perennial powerhouses BYU and Utah from its ranks this year.

Yet, there's already rumbling and grumbling that the Broncos won't be around for long.

The Big East is considering adding Boise State football to help bolster the conference's chances of retaining its BCS automatic bid, though both sides still need to be persuaded that it's the right move.

The Broncos play their first Mountain West game on Saturday at Colorado State (3-2, 1-0).

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