Johnson is confirmed to have suffered a ruptured Achilles tendon during Sunday's regular season opener against the Titans. Johnson is now expected to miss the remainder of this season. With three career Pro Bowl appearances and 484 total tackles over the past four seasons, Johnson is among the league's best linebackers and his absence represents a huge blow to the Chiefs' defense. Furthermore, with Joe Mays (elbow) out, Kansas City's starting inside linebackers currently project to be Josh Mauga and James-Michael Johnson, a pair of unproven players that could cause the Chiefs to explore free agency for alternatives.