eBaseball Professional Yakyuu Spirits 2021: Grand Slam (eBASEBALLプロ野球スピリッツ2021 グランドスラム?) is a baseball simulation video game developed by PawaPuro Productions and published by Konami and released for the Nintendo Switch on July 8, 2021 in Japan. It is part of the Professional Baseball Spirits series, a spin-off series of the MLB Power Pros.