Who are we? Maryland Association of Softball Officials (MASO) provides fastpitch softball umpire services to Central Maryland-area public schools (MPSSAA), private schools as part of the Maryland Interscholastic Athletic Association (IAAM), and National Club Softball Association (NCSA). What does being an umpire mean? Being an umpire is much more than understanding pitching, hitting, catching, and baserunning; … Continue reading About MASO