Third-year Lions linebacker Steve Longa did, in fact, suffer a torn ACL that will end his season, Kyle Meinke of MLive.com reports . Longa tore the ligament while chasing down Giants quarterback Kyle Lauletta and is expected to be placed on IR Monday. The Lions weren’t going to use Longa as a starter — Jarrad Davis , Christian Jones and Devon Kennard are entrenched as their first-string ‘backers — but the former UDFA was a key part of Detroit’s special teams corps. This may open up a spot for Miles Killebrew , a former safety who’s been working with the Lions’ linebackers in recent weeks. Killebrew also serves as a regular on special teams.