Complex sentence: Before the mall was planned, the land was to be the site of a domed baseball stadium proposed by then Brooklyn Dodgers owner Walter O'Malley, however, the plan fell through, and the Dodgers moved to Los Angeles in 1958.
Split into simpler sentences: Before the mall was planned, the land was to be the site of a domed baseball stadium proposed by then Brooklyn Dodgers owner Walter O'Malley. However, the plan fell through, and the Dodgers moved to Los Angeles in 1958.