Complex sentence: The two played together on the Rochester/Cincinnati Royals from 1955 to 1958 until Stokes suffered a crippling head injury from a fall during a game; after which, Twyman became Stokes'legal guardian until the latter's death in 1970.
Split into simpler sentences: The two played together on the Rochester/Cincinnati Royals from 1955 to 1958 until Stokes suffered a crippling head injury from a fall during a game. Twyman then became Stokes'legal guardian until the latter's death in 1970.