The Rays' second baseman had precautionary X-rays that were negative.
Roberts suffered the injury in the bottom of the sixth, when O's outfielder Nate McLouth stole second base and collided with Roberts.
Roberts finished the inning, but Jose Lobaton pinch-hit for him in the top of the seventh and Elliot Johnson finished the game at second base.
Ironically, home runs by Roberts and Johnson accounted for the Rays' only runs.
Roberts' status for Wednesday's game is unknown, but the gritty infielder stated his intentions after the game.
"If it's up to me, I'm playing," Roberts said. "I don't like to not play. I can't remember the last time I came out of a game. But it happens sometimes.
"Obviously, I don't want to do anything to jeopardize the rest of my career or the rest of the year for me. But we're in a tight race and these games mean a lot, so I definitely want to play even if it's going to hurt just a little bit."