Softbank Hawks announced on the 21st that pitcher Ryosuke Otsu underwent surgery at a hospital in Saga City for a right olecranon stress fracture and bone spur disorder, consisting of right olecranon screw fixation and right elbow joint cleaning.

This season, he was in full rotation from the opening day, contributing significantly to the team's third consecutive league title with 12 wins, 5 losses, and a 2.68 ERA. However, on the 9th of this month, he was moved to the rehabilitation group due to a right shoulder condition, and he was unable to pitch in the postseason. He is expected to take four to five months to return to competition.