High Quality Content by WIKIPEDIA articles! George Michael Steinbrenner III (July 4, 1930 – July 13, 2010) was an American businessman who was the principal owner and managing partner of Major League Baseball`s New York Yankees. During Steinbrenner`s 37-year ownership from 1973 to his death in July 2010, the longest in club history, the Yankees earned 7 World Series titles and 11 pennants. His outspokenness and role in driving up player salaries made him one of the sport`s most controversial figures. Steinbrenner was also involved in the Great Lakes shipping industry.