BOISE, Idaho — Boise State coach Chris Petersen simply refuses to get into the campaign business.

After his sixth-ranked Broncos rolled over New Mexico State, 42-7, Saturday to finish 13-0 and go undefeated for the second straight season, Petersen resisted any urge he might have had to argue that the Broncos deserve an invitation to the Bowl Championship Series.

“I think our record speaks for itself,” said Petersen, whose team went 12-0 last year only to be left out of college football’s big-money bowl games. “We have faith in this system and think that it should work out. I don’t know why I think it will work. I just have a feeling it should work out like it should this year.”

Broncos safety Jeron Johnson wasn’t nearly as subtle, showing up at the postgame news conference sporting a sombrero. Some analysts have pegged the Broncos for a trip to the Fiesta Bowl. But that hinges on several factors, including Texas beating Nebraska in the Big 12 title game Saturday night.

“It’s something I would like to happen, but we have to wait and see what happens,” said Johnson, who with the rest of the Broncos will have to wait until tonight to find out their postseason destination.

The win over the Aggies (3-10, 1-7) gave Boise the outright Western Athletic Conference title for the second straight year. The Broncos have dominated the WAC this decade, winning seven of the last eight titles, including the 2005 title it shared with Nevada. Boise State has won 26 straight regular-season games and 55 straight regular- season home games.

Doug Martin led the way with four touchdowns, and the defense held New Mexico State to 49 yards passing.