Jackson Arnold adapting to being QB1 for OUby:Bob Przybylo•12/12/23•BPrzybyloRead In AppSep 2, 2023; Norman, Oklahoma, USA; Oklahoma Sooners quarterback Jackson Arnold (10) warms up before the game against the Arkansas State Red Wolves at Gaylord Family-Oklahoma Memorial Stadium. Mandatory Credit: Kevin Jairaj-USA TODAY SportsIt's his show now as OU true freshman quarterback Jackson Arnold is beginning to understand what it's like being the starting guy.