Oakland A's Legend Rickey Henderson Dead at 65

Baseball's "Man of Steal," Hall of Famer Rickey Henderson is dead after a bout with pneumonia ... TMZ has learned. Sources with direct knowledge tell us ... Henderson passed away Friday in the Oakland area, and had been getting treatment at a hospital for a brief period. The MLB legend holds the record for stolen bases, and played left field for 9 teams from 1979 to 2003. Most of those years were spent with the…