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As injuries have piled up, the market at certain positions has gotten ridiculously thin.

But at quarterback, it’s especially so, and the latest example is in Tennessee.

Via Jim Wyatt of the team’s official website, the Titans have added journeyman Mike Kafka to the practice squad, among a few other roster moves.

They also promoted safety Josh Aubrey to the 53-man roster from the practice squad, and placed running back Dexter McCluster on injured reserve. They also added wide receiver Nick Harwell to the practice squad. More moves will be coming, as they have pass-rusher Derrick Morgan to put on IR later.

The Titans have just two quarterbacks on the active roster, Marcus Mariota and Zach Mettenberger. Kafka gives them a third arm for the last three weeks of practice.

A fourth-round pick of the Eagles in 2010, Kafka has hung around the fringes of rosters since then, spending time with the Jaguars, Buccaneers and Vikings. But he hasn’t thrown a pass since 2011, when he threw 16 of them in four games with the Eagles.