MIAMI -- Marlins shortstop Miguel Rojas left Wednesday's 1-0 loss to the Rays at Marlins Park after four innings with what the team called back spasms and is listed as day to day.

Rojas felt his left side grab when he was running from first to second on the final out of the fourth inning, and it pinched again when he bent down to field a grounder in warmups in the fifth. After the game, he described it as a rib issue.

"Nothing serious," Rojas said. "I don't think it's muscular or anything, or something that is going to keep me from playing. I feel one of my ribs went out of place. Every time I get it adjusted, I feel fine."

Rojas said he has been dealing with a rib on his left side that occasionally gets out of joint, but he noted that with treatment, he is fine after a few minutes.

"The problem was it happened in the middle of the game," Rojas said. "I couldn't get a trainer to get it adjusted, but now, I came in and got some treatment and I feel fine."

Jon Berti replaced Rojas at shortstop.

Rojas had one hit in two at-bats on Wednesday and is hitting .242 in 38 games.

Miami opened the season with Rojas and JT Riddle splitting time at shortstop. But Rojas showed more consistency and was given the job full time, and Riddle was optioned to Triple-A New Orleans.