Slay had knee surgery last Friday and has not been put on IR. Week-to-week thing.
Fansided "When the Detroit Lions announced that rookie cornerback Darius Slay had a knee injury, fans immediately thought the worst. But after a few days of worrying, the news actually isn’t as bad as it could have been although the verdict is still out on Slay. ESPN is reporting that Slay has been..." December 07
Detroit News "Darius Slay knows now he wasn’t just pulled for a pinch-hitter. For the time being he has been replaced at right cornerback by veteran Rashean Mathis. “I took it serious but I just took it as I need to learn more and get better every day” Slay said Tuesday. “That was it. Just watch ’Shean and..." September 25
Detroit Free Press "As the final seconds ticked off the clock in Thursday’s 24-6 loss to the Browns Lions cornerback Darius Slay looked around the field for his Cleveland counterpart Joe Haden. Slay grew up in SEC country admiring Haden a Florida product both for the way he played and how he played with a swag no..." August 19
Detroit Free Press "Mikel Leshoure practiced and played through hamstring and groin injuries that limited his production last fall. This off-season, Leshoure is taking a different approach to soft-tissue issues that hindered what was, in effect, his rookie year. Leshoure returned to practice Monday for the..." June 05
Detroit News "Lions cornerback Darius Slay, the second-round pick who isn't competing in this weekend's rookie mini-camp after arthroscopic knee surgery, spent the two-hour practice Saturday attached to the hip of defensive coordinator Gunther Cunningham. "Basically you could say it was like a private..." May 12