08:47 AM ET 08.31 | Texas Tech's Baker Mayfield is believed to be the first true freshman walk-on to start a season-opener for a BCS school. Mayfield had more all-purpose yards than Johnny Manziel against the same opponent -- SMU -- in the same venue a year ago. Mayfield fell one touchdown shy of Manziel's performance against SMU with five -- four passing and one 10-yard scramble. Head coach Kliff Kingsbury said Mayfield is no ordinary walk-on. "He earned (a scholarship) a while back. I just had to keep it under wraps. He had practiced like a senior for the last week and I expected him to play really well. I couldn't be more impressed with the way he's handled the operation, handled his teammates and I'm just happy he got to play as well as I thought he could." Kingsbury added Mayfield is still a walk-on, but the team is working the numbers to put him on scholarship as soon as possible.