Ruggiano left Friday night's game with a right shoulder sprain after diving for a ball hit by New York's Scott Hairston in the fifth inning. He said he wasn't expecting to have an MRI, but it would probably be 24-48 hours before he resumed baseball activities.
"Until it calms down, I won't really know what I'm capable of doing," Ruggiano said.
To add depth to a beleaguered lineup, the Marlins called up outfielder Scott Cousins on Saturday. The team is also likely without Austin Kearns (back) and Giancarlo Stanton (oblique), leaving manager Ozzie Guillen with a thin bench for the weekend series.
For Saturday, Cousins and catcher Rob Brantly were likely the only available bats off the bench, with no right-handed hitters available.
Stanton has been out since Sunday after tweaking his side while sliding in last weekend's series against the Reds. He figures to be back before season's end, but hasn't recovered in the way he had hoped.
"Earlier it was everything, but throwing was better and running was better," Stanton said. "So there was a little progress, but hitting was the main thing."