Complex sentence: McCaskey, son of current Bears principal owner Virginia Halas McCaskey, is the oldest grandchild of George Halas and became president of the Bears in 1983 after Halas' death.
Split into simpler sentences: McCaskey, son of current Bears principal owner Virginia Halas McCaskey, is the oldest grandchild of George Halas. He became president of the Bears in 1983 after Halas' death.