Green has been diagnosed with a sprained right UCL and a strained right flexor tendon, Mark Feinsand of the New York Daily News reports.
The injury forced Green off the mound Friday after 1.2 innings (54 pitches). He will see a doctor in New York on Monday for a full evaluation but it sounds like he will almost certainly miss a couple starts and Green's season may very well be over. Luis Severino did not pitch in relief of Green on Friday but would seem like a top candidate to take his spot in the rotation.