Complex sentence: He maintains a strong connection to his high school, where his baseball uniform number has been retired, and the school's baseball field sits on Mulholland Drive; it was renamed so in 1994 after Mulholland purchased a new lighting system for the field.
Split into simpler sentences: He maintains a strong connection to his high school, where his baseball uniform number has been retired. The school's baseball field sits on Mulholland Drive; it was renamed so in 1994 after Mulholland purchased a new lighting system for the field.