OAKLAND, Calif. -  

Philip Rivers threw a 6-yard touchdown pass to Malcom Floyd, Nate Kaeding kicked five field goals and the San Diego Chargers spoiled Dennis Allen's debut as Oakland coach by beating the Raiders 22-14 on Monday night.

The Raiders were looking to start a new era on a positive note but were done in by an offense that couldn't score a touchdown until the final minute and three botched punts after an injury to Pro Bowl long snapper Jon Condo.

The Chargers did enough to win on a night they started undrafted rookie Mike Harris at left tackle and were missing starting running back Ryan Mathews and receiver Vincent Brown to injuries.