The Phillies shortstop fouled a ball off his right knee on Saturday and left the game after trying to play a couple of innings.
Rollins has not had an X-ray.
"I don't think it's a DL thing," Rollins told CSNPhilly.com's Jim Salisbury. "If it's still swollen in four days and there's no improvement we might have to take a closer look into it, but I definitely wouldn't put it that far at this point. I can still walk on it."
The Phillies start a three-game series against the Dodgers on Monday.For more baseball news, rumors and analysis, follow @cbssportsmlb on Twitter or subscribe to the RSS feed.