In 1966, Don Wigginton led Spring Branch to the AAAA State Championship game where it lost to San Angelo 21–14.
He handled a bad snap, and Happy Feller booted the extra point for the win and the consensus National Title.
In the spring of 1971 Wigginton, by then married with a child, turned down an offer to give up his last year of eligibility to coach at West Texas State and instead returned to back up Phillips again.
He shared quarterback duties in the Cotton Bowl with starter Phillips in a 30–6 loss to Penn State, who was determined to avenge their denial of the 1969 National Championship.
Despite sharing quarterback duties with Phillips, Wigginton ended the year as the Southwest Conference leader in touchdowns from scrimmage and tied the school record for the same.