Complex sentence: The PL folded following the 1890 season, and Kinslow stayed in Brooklyn, signing with the Brooklyn Bridegrooms of the NL, following John Montgomery Ward, who was hired as team's new manager.
Split into simpler sentences: The PL folded following the 1890 season, and Kinslow stayed in Brooklyn by signing with the Brooklyn Bridegrooms of the NL. He followed John Montgomery Ward, who was hired as team's new manager.