MIAMI -- Marlins rookie shortstop JT Riddle will not play again this season because of a shoulder injury.

The Marlins announced Riddle is scheduled to repair a SLAP tear, an injury to his left labrum, on Aug. 11. Marlins president of baseball operations Michael Hill said Riddle will be ready by Spring Training next year.

"To have that injury, this is his non-throwing shoulder," Hill said. "It's one of those things in baseball that's unfortunate, and we have to deal with. You hope you have enough depth to overcome it."

Riddle received two MRIs on his shoulder, the second of which came on Monday. Marlins manager Don Mattingly said prior to Tuesday's game against the Nationals that it wasn't encouraging.

Riddle played in 70 games this season, most of which came after the Marlins dealt Adeiny Hechavarria to the Rays on June 26. Before landing on the DL on July 25, the rookie posted a slash line of .250/.282/.355 with three home runs and 31 RBIs.

"He was starting to put things together, and we were hopeful that he had the remainder of the season to continue to play and continue to develop into a top-level productive everyday shortstop," Hill said.

Justin Bour 's status for the remainder of this year is also in question. Mattingly said the first baseman is three weeks from doing baseball-related activities and could be four to six weeks from returning. He has been on the 10-day DL since July 25 with a strained right oblique.

"He's still a ways away," Mattingly said. "Originally, we thought that was a regular old strained oblique, but he did some damage in there."

A T-Mobile Home Run Derby participant this year, Bour has clubbed 21 homers and tallied 63 RBIs in 87 games while posting a slash line of .289/.366/.548.

Tomas Telis and Tyler Moore have split time at first with Bour on the shelf, while Miguel Rojas has taken over everyday shortstop duties in Riddle's absence.

"We have Miguel Rojas, who is back healthy now," Hill said. "That will absorb some of it. But you lose [Riddle] for the rest of the season."

Prado, Barraclough progressing

Reliever Kyle Barraclough (right shoulder impingement) could be the first of Miami's injured pieces to come off the DL. He threw on flat ground Monday, but Mattingly said he won't return on the club's next road trip, which begins on Friday in Atlanta.

"Pretty good news with Bear," Mattingly said. "Again, we wanna be cautious with him and make sure this guy's healthy."

The Marlins are hopeful Martin Prado will return in September. The third baseman is progressing well in therapy after undergoing successful surgery last week on his right meniscus.

"He's getting better," Mattingly said. "Obviously, that's a little bit of a timetable."