Freeman has thrown for 13 TDs with one interception in his past five games, helping the Bucs (5-4) win four times to climb back over .500 following a 1-3 start.
Rivers threw for 337 yards and three touchdowns for San Diego. He was intercepted twice in the fourth quarter to ruin any chance of the Chargers (4-5) coming from behind.
Bucs linebacker Quincy Black was carted off the field after tackling running back Ryan Matthews for a 1-yard loss late in the third quarter. There was no immediate announcement on the nature of the injury, however trainers examined the sixth-year pro for several minutes before immobilizing his neck and back and strapping him to a stretcher.
Copyright 2012 by The Associated Press