Western Michigan quarterback Alex Carder rushed for his third touchdown of the day in the third quarter and Ball State trails 45-9.
The Cardinals kicked a 29-yard field goal on their first drive of the second half, but the Broncos responded with a touchdown on the ensuing possession.
Kelly Page replaced Keith Wenning as Ball State's quarterback to start the second half and went 6-for-11 for 68 yards in the quarter.
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