Kaeding suffered a torn ACL on the opening kickoff against Minnesota Sunday. The Vikings' Percy Harvin returned that kick 103 yards for a score.
The Chargers, who won the game 24-17, are expected to try out other kickers to take Kaeding's spot.
Mike Scifres filled in for Kaeding Sunday. He kicked a 40-yard field goal and converted three extra points, while handling both punting and kicking duties.
Kaeding, an eight-year veteran, has made 173 of 200 field-goal attempts for the Chargers.