The Lions held a three-day mandatory minicamp at their Allen Park training facility this week.
For safety Glover Quin, who missed workouts and OTAs to spend more time with his family, it was his first set of practices with the team this offseason.
"I'm just trying to soak up as much of the playbook as I can," Quin said Tuesday. "As I've said, football is football to me. I thank God every day because one of the things I've felt he blessed me with is a great football mind. Just being able to learn and understand defenses has been fairly easy for me.