The Dragons announced today that Kazuki Yoshimi will have reconstructive surgery on his right ulnar collateral ligament (elbow) on June 4. This will be the third time he has had surgery on his right elbow. There is no timetable for his return, but based on past cases, he may require about a year for a full recovery.
UPDATE 5/22 @ 5:00pm -
To clarify: Yoshimi will undergo Tommy John surgery.