But will he panic over his struggles as the team rides an eight-game winning streak? No.
"Obviously it wasn't out best effort throwing the ball, and obviously, I have a lot to do with that," Rivers said. "After watching it, going over it, there are a few things to clean up, and you keep moving along."
Rivers was dreadful in completing but 8-of-23 passes for 97 yards and two interceptions. His rating was a career-low 12.4.
"It was a bunch of silly stuff," Rivers said of his problems. "I wasn't too sharp."
Coach Marty Schottenheimer wasn't looking for a panic button to push, either.
"Any time you develop a young quarterback you will see this happen," he said. "I don't care who it is. Whether it's Bernie Kosar, whether it's Ben Roethlisberger, whether it's Peyton Manning, they all go through it."
One can add Rivers' name to the list. But LaDainian Tomlinson expects the game comes with a lesson, too.
"Everybody has games they want to put behind them," he said. "This (was) Philip's game. He's going to learn from that.
"He's still a young player. Things, for the most part, have been a breeze for him. But everybody goes through it."