Rivers is having a terrific season. He¿s fourth in passer rating (105.9), has 18 TDs, 7 INTs and is completing 71.6 percent of his passes. CB Brent Grimes is a big test for any QB. Everyone else is vulnerable. With TE Antonio Gates and WRs Danny Woodhead and Keenan Allen at his disposal, Rivers will do damage while making few mistakes.