Miami Marlins right-hander David Phelps will miss the remainder of the season with a stress fracture of the radius bone in his right forearm, the team announced Tuesday.

Phelps, who exited Sunday's start in St. Louis in the third inning, flew back to Miami to visit with medical director Dr. Lee Kaplan and undergo an MRI on Monday. He felt the right elbow discomfort and left the mound one pitch after surrendering his second homer to Jason Heyward.

The 28-year-old righty went 4-8 with a 4.50 ERA in 23 games (a career-high 19 starts) in 2015, falling one inning shy of his personal mark of 113 set last season with the New York Yankees. His starter's ERA was 4.39. After going 4-5 with a 3.86 ERA during the first half, Phelps struggled with an 0-3 record and 6.94 ERA in five outings following the All-Star break.

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The Marlins acquired Phelps, who is arbitration eligible this winter, along with Martin Prado from the Yankees this past offseason for right-hander Nathan Eovaldi and Garrett Jones. As expected, Phelps' ability to pitch both out of the bullpen and rotation proved valuable with several starters -- ace Jose Fernandez, 2014 All-Star Henderson Alvarez, righties Mat Latos and Jarred Cosart -- on the disabled list at various points this season.

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