"Marlins pitcher Ricky Nolasco will miss his scheduled start Sunday because of a torn medial meniscus in his right knee and could be out much longer.

Nolasco said he injured his knee Thursday, hearing a "pop" as he changed his shoes while sitting at his locker.

"It was kind of a fluke thing," Nolasco said. "I can't really believe this has happened to me. It's frustrating, but I have to be smart about it. There's not much I can do now."

Marlins manager Edwin Rodriguez said left-hander Andrew Miller, who was recalled from Class AA Jacksonville on Thursday, will start Sunday's series finale against the Houston Astros. Miller, a former first-round pick of the Detroit Tigers who came to Florida in the Miguel Cabrera trade, has spent the entire season in the minors.

Rodriguez said that Nolasco will not go on the disabled list just yet.

"Hopefully, it's not that serious," Rodriguez said after the Marlins' 6-3 victory over the Astros on Saturday night.

Marlins outfielder Chris Coghlan tore his meniscus July 25 while celebrating a victory and will miss the rest of the season after undergoing surgery.

Nolasco said the plan is to wait a few days for the swelling to subside in his knee before a determination is made whether he can pitch again this season. Either way, Nolasco said he likely will need surgery to repair the problem.

"We'll test it to see what I can and can't do," Nolasco said. "Maybe I can play with it the rest of the year and not have surgery until after the season. I just got to wait and see.

"I'd like to continue the year and have success. But I'm not going to gamble with my career."

If Nolasco is out for the season, he would be the second front-line player to be lost in as many days. Catcher Ronny Paulino was banned for 50 games Friday by Major League Baseball after testing positive for an unspecified performance-enhancing substance."