After being examined, Ruggiano is confident he will be able to play sometime in the final 11 games.
Manager Ozzie Guillen said he doesn't expect the outfielder back on Saturday.
"I jammed it," Ruggiano said. "I know it's not too serious."
To add depth, outfielder Scott Cousins, who spent most of the season at Triple-A New Orleans, is being called up.
The injury occurred in the fifth inning when New York's Scott Hairston lined a triple to left field. Ruggiano made a diving attempt on the ball that skipped by him.
"I dreaded throwing the ball in," he said.
When the play was over, Ruggiano removed himself, moving gingerly off the field as assistant team trainer Mike Kozak and Guillen tended to him.
One of the Marlins' top performers this season, Ruggiano is batting .313 with 13 homers and 36 RBIs.
For most of the second half, Ruggiano has dealt with back spasms.
The Marlins acquired Ruggiano from the Astros in May, and he has been a regular for most of this tenure with the club.
Bryan Petersen replaced Ruggiano on Friday night.
Miami's outfield is thin on depth because Giancarlo Stanton is resting a sore left intercostal muscle.