San Diego State enters the revived Pac-12 Conference in 2026 after a 9-4 campaign in 2025, its strongest recent showing under third-year head coach Sean Lewis. The Aztecs face a significantly tougher slate that includes road games at UCLA and matchups against fellow conference newcomers Boise State, Fresno State, and others, alongside non-conference tests against James Madison and additional Power-level opponents. Key roster turnover and the installation of first-year defensive coordinator Demetrius Sumler add uncertainty to a unit that must adapt quickly to elevated competition. Media reports from July 2026 highlight ongoing contract adjustments for Lewis tied to the conference move, while early previews project records near 8-4 and set the win total line at 7.5. Trader sentiment centers on whether the program can sustain momentum in a more demanding environment or if the step up in schedule strength leads to regression.