Igwebuike secured a spot on the Lions' initial 53-man roster, Kyle Meinke of MLive.com reports.
The converted safety apparently showed enough promise to make the team over Dedrick Mills and Craig Reynolds. While Igwebuike won't see many touches on offense unless Jamaal Williams or Jermar Jefferson joins D'Andre Swift (groin) on the injury report, Igwebuike should contribute on special teams right away.