Aaron Boone said the Yankees pitching prospect complained about “elbow stuff” after throwing a bullpen on Friday.

Yankees pitching prospect Chase Hampton has been diagnosed with a right flexor strain and appears to have “something going on” in his right ulnar collateral ligament, manager Aaron Boone said on Thursday.

Yankees prospect Chase Hampton is dealing with a right flexor strain and a right ulnar collateral ligament issue in his pitching arm and had to be sent to New York for testing, manager Aaron Boone told reporters Wednesday.