Rookie William Byron battled back to qualify second at 188.139 mph in the No. 55 Venturini Motorsports - Liberty University Toyota .
Rookie William Byron 's practice session this morning was cut short because of an engine change .
Rookie William Byron , whose practice session this morning was cut short because of an engine change , battled back to qualify second at 188.139 mph in the No. 55 Venturini Motorsports - Liberty University Toyota .