The Lions traded for Shaun Hill in March, gave him a one-year contract extension four months later and turned the keys of their offense over to him Sunday.
The backup quarterback played the entire second half of the Lions' 19-14 season-opening loss to the Bears after starter Matthew Stafford suffered a right shoulder injury.
Stafford could barely move his arm after the game, and his status for next week's home opener against the Eagles is unknown.
"It's my job to be ready no matter what and I feel like that's been my M.O. my whole career," Hill said. "Even when I spent all those years as a (third quarterback), I always felt like I prepared like I was going to play, and it's for situations like this."
Still, Lions coach Jim Schwartz said he was confident in Hill after the game. Drew Stanton is the Lions' third-string quarterback, and the team had no other signal callers in training camp.
"There's a reason we have Shaun Hill on this team," Schwartz said. "That's' cause Shaun's an experienced quarterback and he can lead us to wins. So if Matt's not able to go, we have a lot of belief in Shaun."