The man known by many as the Jackie Robinson of professional golf has passed away.  Charles Sifford, who broke golf's color barrier in the 1960s, has died at the age of 92.  Sifford's son told the "Cleveland Plain Dealer" that his father had a heart infection and died as a result of cardiac arrest.  Sifford, who won two PGA events in his playing career, was inducted into the World Golf Hall of Fame in 2004.  The pioneer was also presented with the highest U.S. civilian honor -- the Presidential Medal of Freedom -- last November.