Panthers receiver Steve Smith on Friday again was giving random "percentages" about the strength of his sprained left knee and the odds that he'll play Sunday against San Francisco.

But the bottom line is this: The questions about Smith's effectiveness won't be answered until Sunday when he takes the field against the 49ers.

Smith jokingly said there's an 89 percent chance he'll play, a number he decided on because it also happens to be his jersey number.

But when the crowd of reporters thinned out around his locker later Friday, Smith conceded his knee didn't feel particularly good Thursday.

"I'm going to just play ball. That's all I'm going to do, is play ball," Smith said. "Like I said, yesterday I didn't do as well as I expected. And that's life."

Smith said it was hard to gauge his status Friday because he only ran about five routes because he was concerned about aggravating the injury -- a sprained posterior collateral ligament -- in the rain.