Seibu Lions announced on the 30th that they have signed a professional contract with pitcher Ryosuke Moriwaki. number will be '28'.

Moriwaki commented through the team, "Of course I was happy when I heard about the offer to sign a regular contract, but the strongest feeling I had was, 'It's finally here,' and rather than thinking about the past, I pictured myself standing on mound in the first team and pitching. Since returning from rehabilitation, I've felt like I've been able to identify and correct my weaknesses with each appearance, and I've been able to grow step by step. I think that accumulation has led me to where I am today. This year, instead of setting a goal of 'this far,' I've been working with the intention of continuously pushing my own limits. I want to continue to grow, always aiming to exceed 100%."

Koji Hiroike, Director and General Manager of the Baseball Club, said, “Since being diagnosed with right brachial artery occlusion in July 2023 and undergoing surgery the following month, he has spent the past three years—a long period—undergoing rehabilitation and pitching in the farm system. His name has come up many times before, but the time has finally come.He has posted solid numbers in the farm system this year, and above all, Moriwaki pitcher possesses the strength to have overcome a crisis that threatened his playing career, as well as experience on the first team. I expect him to become a major asset to the first-team bullpen and to live up to the expectations of the fans who have continued to believe in his comeback and everyone who has supported him thus far.”