Softbank Hawks announced on the 30th that they have signed pitcher Jackson Rutledge. number will be "14". Through the team, he commented, "I am very much looking forward to playing the rest of the season as a member of Fukuoka Softbank Hawks. I am looking forward to arriving in Japan and meeting The Hawks fans. I will do my best to contribute to the team's championship victory."

Rutledge was also selected first overall (17th overall) by the Nationals in the 2019 MLB draft. He made his major league debut with the Nationals in 2023. He has appeared in 71 games, compiling a 5-3 record with a 6.29 ERA. The experienced right-hander is likely to be the final piece of the puzzle for the Nationals to win their third consecutive league championship.

On the 27th, three pitcher from the development league—Zhang Chun-Wei Chang, Kobayashi Juto, Luis Rodriguez were added to the main roster. The return of last season's Pacific League MVP left-hander, Moinelo, is also imminent. As manager Kokubo says, "Starting pitching remains a challenge" for the second half of the season, but these thorough reinforcements have eliminated any blind spots. With these additions, the number of players on the main roster has reached the maximum limit of 70.