Creighton Gubanich of the Boston Red Sox hits a grand slam for his first major league hit in a 12 – 11, 10-inning loss to Oakland at McAfee Coliseum. Gubanich becomes the fourth major leaguer to accomplish the feat and the first since Seattle’s Orlando Mercado did it on September 19, 1982.

This Day In Baseball

On May 3, 1999 — Creighton Gubanich of the Boston Red Sox hits a grand slam for his first major league hit in a 12 – 11, 10-inning loss to Oakland at McAfee Coliseum. Gubanich becomes the fourth major leaguer to accomplish the feat and the first since Seattle’s Orlando Mercado did it on September 19, 1982.

Source:
Baseball Reference May 3