Prado was injured in the first inning after tripping over first base. An X-ray came back negative while revealing a sprain of his AC joint. The 31-year-old saw a doctor prior to Monday's contest and received a platelet-rich plasma (PRP) injection in the shoulder, which will likely require him to miss about a week of play, but avoid a trip to the disabled list.
"He's still battling some soreness," manager Dan Jennings said. "We told him yesterday before he left that he would get the day off because he's such a gamer and wants to play every day."
On the season, Prado is batting .272 with 24 RBIs in 63 games.
Derek Dietrich, just recalled from Triple-A New Orleans on Friday, started at third on Monday. The 25-year-old was the Marlins' 2014 Opening Day second baseman and is a career .219 hitter with 14 home runs and 40 RBIs in 108 big league games. He struck out in his first two at-bats after his promotion.
"I want him to relax and let the game come to him," Jennings said. "We know he has ability. He's come up and maybe tried to do a little bit too much in his first [two] at-bats. … One swing, he can put some runs on the board. There's definitely power in that bat."
As for another injured Marlins position player, first baseman Michael Morse -- on the 15-day DL since May 26 with a finger sprain -- is set to be back soon. Jennings said the slugger, who was signed in the offseason and is hitting .211 with two home runs in 37 games, will begin a rehab stint in the near future, possibly as soon as Wednesday with Double-A Jacksonville.
"It looks like somewhere midweek," Jennings said. "He's going to take [batting practice] again today on the field. He said the finger's better. So we just need to get him where he sees some live pitching and get his timing right. You know what? It would be nice to have him back in this lineup. We went and got him for a reason -- the power and ability to hit."
Steve Wilaj is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.