SAN DIEGO - The Chargers placed linebacker Carlos Polk on injured reserve Tuesday, two days after Polk injured his left shoulder in the loss to Jacksonville.

The Chargers promoted linebacker Jyles Tucker from the practice squad to replace Polk. Tucker is a rookie from Wake Forest.

Polk, a seven-year veteran, is one of the Chargers' top special teams' performers. He leads the team with 12 special teams' tackles.