Justice William O. Douglas served more than 36 years on the Court from 1949–1975. However, many other justices have served more than 30 years, including: Stephen J. Field (34 years), John Marshall (34 years), Joseph Story (34 years), John Marshall Harlan (34 years), Hugo Black (34 years), William Brennan (33 years), William Rehnquist (33 years), John McLean (32 years), James Wayne (32 years), and William Johnson (30 years). Current U.S. Supreme Court Justice John Paul Stevens could break the record for longevity if he serves until July 2012. However, as of this printing, speculation has indicated that Stevens will retire in 2010.