Players reported back to Lions headquarters this week for the start of voluntary offseason workouts.
The only player not in attendance was starting safety James Ihedigbo, who is unhappy with his current contract situation.
"It's April. It's still early," Quin said Wednesday during his media session. "He's working out, running back in Houston. I know that because I train with him. So obviously he had to make a decision for him and his family and it is what it is.
"We're going to work and trust when [Ihedigbo] comes in, he'll be ready.