Lions sign Hickman, release Corvey Irvin

DETROIT -- Having finished their rookie minicamp a day ago and starting organized team activities Tuesday, the Detroit Lions made one move on Monday.

And it was a shift on their defensive line.

The Lions signed undrafted free agent Gregory Hickman from Florida International, releasing veteran Corvey Irvin. Hickman had 44 tackles and four sacks for FIU last season.

Irvin was signed earlier this offseason to a one-year deal and was due to make $570,000 against the cap this season.