Ross, in the chase for the Marlins' center-field job, pulled up when his knee buckled while trying to steal second base on Friday against the Astros in Kissimmee, Fla.
"I'm doing everything [Sunday], and going from there," said Ross, who could be back in the lineup as early as Monday when the Astros visit Jupiter, Fla.
A more realistic game could be on Tuesday against the Orioles on Tuesday at Fort Lauderdale Stadium.
When he returns, he plans on wearing a protective sleeve on his left knee. He hasn't worn one thus far in spring.
Ross received a scare when he felt discomfort in his leg on a steal play that turned into an easy out when he pulled up and didn't slide. Initially, the fear was that he tweaked a left hamstring problem that hampered him most of 2007.
But the problem was to the side of Ross' knee, and he is back running and hitting.
Jeremy Hermida (tight left hamstring) continues to take batting practice and do limited work as he eases toward doing some running drills.
Matt Treanor was off after he caught five innings of a Minor League game on Sunday. Treanor has been bothered by a sore left calf. He likely will play on Monday.