CBs Slay, Houston limited in practice

ALLEN PARK, Mich. -- A new name popped on the Detroit Lions injury report Thursday -- one that might be a little bit concerning depending on its severity.

Rookie cornerback Darius Slay apparently has a knee injury and it limited him for the Lions. This is the first time Slay has been on the injury report. It is even more concerning because while starter Chris Houston (foot) has been practicing this week, he also has been limited at a position without much depth.

Reggie Bush missed his second straight practice today with a calf injury and Israel Idonije missed with a knee injury. Receiver Calvin Johnson (knee) and safety Louis Delmas (knee) were also limited Thursday.