Chargers claim Zach Mettenberger, who reunites with Ken Whisenhunt

— -- The San Diego Chargers claimed quarterback Zach Mettenberger on waivers Tuesday, the team announced.

The Tennessee Titans had waived Mettenberger on Monday. In San Diego he will be reunited with former Titans head coach Ken Whisenhunt, who is now the Chargers' offensive coordinator.

The Chargers have no clear No. 3 quarterback after Philip Rivers and veteran backup Kellen Clemens. Developmental signal-callers Bryn Renner and Mike Bercovici had been competing for the No. 3 job. Renner was waived to make room for Mettenberger on the roster.

Mettenberger, 24, also knows Rivers from his time at LSU, where the San Diego quarterback's younger brother Stephen began his college career.

At 6-foot-5 and 225 pounds, Mettenberger fits the prototype that San Diego looks for in a quarterback, a strong-armed thrower who can make plays inside the pocket.

A sixth-round pick by the Titans in 2014, Mettenberger started 10 games over two seasons. The Titans didn't win any of those games.

He completed 60.3 percent of his passes with 12 touchdowns, 14 interceptions and a 75.4 passer rating for the Titans. He had the lowest Total QBR in the NFL since 2015, according to ESPN Stats & Information.

ESPN's Adam Schefter, Eric D. Williams and Paul Kuharsky contributed to this report.