On the 25th, Seibu Lions announced that Yuta Kuroki underwent "arthroscopic cleaning of the right shoulder" at a hospital in Tokyo on the 20th. The purpose of the procedure was to improve his condition, and it is expected to take three months for him to return to action.

Kuroki joined Seibu Lions as a development player last season. He signed a contract with the team early and made the opening day team, finishing with a record of 1 win, 1 loss, 3 hold, and an ERA of 3.38 in 29 games.