San Francisco ? On the 50th anniversary of the most famous home run in baseball history, the man who hit it wasn’t in any mood to celebrate.

On the morning of Oct. 3, 2001, Bobby Thomson visited hospitalized children. He spent the afternoon at a firehouse that lost firefighters during the Sept. 11 terrorist attacks. In the evening, he went to ground zero.

“It really wasn’t a time to think about baseball,” Thomson said.

But on Sunday, Thomson and 10 of his teammates on the 1951 New York Giants gathered at Pacific Bell Park for a belated anniversary celebration of “The Shot Heard ‘Round the World” Thomson’s pennant-winning blast into the lower left-field stands of the Polo Grounds that beat the Brooklyn Dodgers.