A new era of  Boise State  football is just around the corner.  After capturing three straight Mountain West titles with a College Football Playoff berth in 2024, the Broncos are leaving the MWC for the  Pac-12  alongside Colorado State, Fresno State,  San Diego State  and Utah State on July 1.  Boise State Broncos On SI  is taking a look at the five biggest questions for the Broncos ahead of their  2026 opener at Oregon . We have already explored the rebuilt receivers room and the defensive back rotation and will now take a look at Boise State’s backup quarterback race.  3. How will the backup quarterback race shake out? When the Boise State offense takes the field on Saturday, Sept.…