ALLEN PARK —  The secondary is a concern to the Lions as they get ready to make the roster cut to 53 on Saturday at 6 p.m.  This afternoon they traded a 2010 draft pick to the Bills for safety Ko Simpson.

“I think he fits what we want to do. He’s multidimensional, he’s got size, he’s got good range, he can also tackle,’’ coach Jim Schwartz said. “He’s been a pretty good contributor on special teams.’’

Schwartz said it’s too early to define what role he will play with the Lions.

The coach also said the 53-main roster that is set on Saturday will probably not be the roster for the opener at New Orleans on Sept. 13.  Lions personnel folks will be scouring the waiver wires over the weekend looking for anyone who might be able to help.