Red Sox manager Alex Cora said Monday that Rodriguez has been diagnosed with a Grade 2 right oblique strain, Alex Speier of The Boston Globe reports.
Cora declined to provide a timetable for the reliever when asked about the matter, but Rodriguez will most likely be sidelined for multiple weeks, if not more than a month. Ryan Sherriff and Oddanier Mosqueda are expected to challenge for a left-handed reliever role with Boston while Rodriguez recuperates.