Tennessee Titans outside linebacker Arden Key is facing a six-game suspension for violating the NFL's policy on performance-enhancing drugs, as reported by multiple sources including Paul Kuharsky and confirmed by Titans head coach Brian Callahan. This suspension is a significant blow to the Titans' defense as Key, who recorded six sacks last season, was expected to start opposite Harold Landry. The team will now rely on veterans Rashad Weaver and Caleb Murphy, along with rookie Jaylen Harrell, to fill the gap. The Titans, already thin at the edge position, may need to explore the free-agent market for additional depth. The suspension comes amid reports of Key's involvement in a training camp altercation, further complicating the team's defensive situation.