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In baseball, a walk-off home run is a home run that ends the game. It must be a home run that gives the home team the lead (and consequently, the win) in the bottom of the final inning of the game. Thus the home team can walk off the field immediately afterward, rather than finishing the inning. The winning runs must still be counted at home plate.
from wikipedia the free encyclopedia jump to navigation search in baseball a walk off home run is a home run which ends the game it must be a home run that gives the home team the lead in the bottom of the 9th inning or the bottom of any extra inning it is called a walk off home run because the teams walk off the field immediately afterward sportscasters also use the term walk off double or other such terms if such a hit drives in the winning run to end the game