Marlins' Andrew Nardi: Shut down after setback

Nardi has halted his throwing program after feeling more tightness in his back, Christina De Nicola of MLB.com reports.

Nardi came into camp with a back injury and had been ramping things up, but now he's suffered a setback. He will be re-evaluated in the coming days, and his readiness for Opening Day would now appear very much in question.