Complex sentence: The following year, he switched to the Texas Rangers organization, as manager of their Tri-Cities affiliate in the Short Season-A Northwest League, then, in 1984, he became the Rangers' roving minor league infield instructor.
Split into simpler sentences: The following year, he switched to the Texas Rangers organization, as manager of their Tri-Cities affiliate in the Short Season-A Northwest League. Then, in 1984, he became the Rangers' roving minor league infield instructor.