BOISE, Idaho (AP) - For the second straight year, Boise State has to adjust to the loss of key players in the secondary of its highly ranked defense.

But this year, the No. 19 Broncos (7-1, 4-0 Mountain West) are confident they have enough senior leaders and seasoned underclassman to avoid the kind of meltdown that contributed to a late-season loss to TCU last year that spoiled an undefeated season and any lofty postseason plans.

Coach Chris Petersen said Bryan Douglas, who started the first three games and the No. 3 cornerback, will miss the rest of the season after tearing an ACL in last week's 45-14 rout at Wyoming. Petersen also said starting safety Lee Hightower's suspension for violating team rules will remain in place at least through Saturday's matchup with San Diego State (6-3, 4-1).