Arizona Diamondbacks' Eduardo Rodriguez pitches during the second inning of...

Arizona Diamondbacks' Eduardo Rodriguez pitches during the second inning of a baseball game against the Philadelphia Phillies, Sunday, May 4, 2025, in Philadelphia. Credit: AP/Matt Rourke

PHOENIX — The Arizona Diamondbacks placed left-handed pitcher Eduardo Rodríguez on the injured list Friday because of shoulder inflammation.

The 32-year-old has struggled this season with a 1-3 record and a 7.05 ERA over nine starts. He's given up 21 earned runs over his past 16 innings, spanning four mostly ineffective starts.

Right-hander Ryne Nelson is the most likely candidate to take Rodriguez's spot in the rotation. He has a 5.13 ERA over 10 outings, including one start.

The D-backs also added right-handers Christian Montes De Oca and Scott McGough to the big league roster and sent struggling left-hander Joe Mantiply to Triple-A Reno.

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