Gibson's grand slam
Pirates @ NationalsApril 20, 1992 | 00:00:21
4/20/92: Kirk Gibson hits a grand slam in the top of the 9th to expand the Pirates' lead to 8-1 over the Expos
4/20/92: Kirk Gibson hits a grand slam in the top of the 9th to expand the Pirates' lead to 8-1 over the Expos