McFarland underwent an MRI on Friday which detected a bone spur in his left elbow, but he will resume playing catch immediately since the injury cannot be made any worse, Jody Jackson of Fox Sports Arizona reports.

McFarland hopes that he will be able to return to action soon, though it's unclear how much time he will require to build up arm strength again after suffering the injury last weekend. On the year, he's logged a 2.00 ERA and 1.19 WHIP and should return to a low-leverage role upon his return.

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