Upset of the week: Air Force over TCU

Defending Rose Bowl champion TCU has won 36 of its past 40 games, but the No. 25 Horned Frogs will fall to 0-2 after playing at Air Force on Saturday.

TCU’s rebuilt defense was exposed in last week’s 50-48 loss at Baylor, allowing 564 yards of offense. Falcons quarterback Tim Jefferson, a senior from Atlanta, doesn’t throw the ball like Baylor star Robert Griffin III, but he runs the triple-option offense to near perfection.

The Falcons ran for 391 yards in last week’s 37-20 victory over FCS opponent South Dakota.