MINNEAPOLIS — In recent years, Carolina fans have been told that the defense is better, but those promises have never translated into performance on the field. At least for most of the opener, the Tar Heels unit under first-year coordinator Geoff Collins proved their mettle. The unit forced five three-and-outs to help UNC overcome Max Johnson’s injury to earn a 19–17 victory Thursday night at Huntington Bank Stadium behind four second-half Noah Burnette field goals.