Thomas is not in the lineup for the second game of Wednesday's doubleheader versus the Guardians, Jesse Friedman of GoPHNX.com reports.
Thomas went 0-for-2 with a walk and a run scored in the Diamondbacks' 7-3 win in the first game of the day before getting removed for a pinch hitter. He'll begin the second contest on the bench but will be an option to enter late as a defensive replacement should the Diamondbacks grab the lead.