Softbank Hawks pitcher Osuna was placed on the second team for the start of the season on the 26th. The right-hander agreed to a massive four-year contract worth approximately 4 billion yen in 2023. General Manager Mikasa Sugihiko commented on the fact that the contract included a memorandum of understanding stating that he would be used as a closer.

Osuna participated in the overall practice that day at the Mizuho Payday Dome. He had been expected to battle with Sugiyama for the starting lineup this season, but he missed the season opener with a 4 runs, ERA 4.50 in eight appearances in the open games. GM Mikasa stated, "We have decided not to register him for the game as we are discussing our policy on his usage.