Philip Rivers hobbled through half of practice Thursday, increasing the chances he'll play in Sunday's home game against the Detroit Lions. "That's the plan, but it's not Sunday," Rivers said. "We don't have to know right now." Rivers said his sprained left knee is getting better. He took half his normal snaps a day after taking none. "I felt good," said Rivers, who was hurt in Sunday's game at Tennessee but returned to lead the AFC West-leading Chargers (8-5) to an overtime win. "It's getting better. It's a process. How you feel on Thursday isn't always how you're going to feel on Sunday, but it's certainly gotten a lot better." "I just think it's important at this position to get some reps in practice rather than go out there cold. Again, I took half of them today and felt pretty good. Hopefully, I'll increase it tomorrow and be ready," he said.