Mariner rookie Orlando Mercado becomes the third player to hit a grand slam for his first major league hit. Bill Duggelby (1898 – first at bat) and Bobby Bonds (1968 – third at bat) were the other two players to accomplish the feat.
Mariner rookie Orlando Mercado becomes the third player to hit a grand slam for his first major league hit. Bill Duggelby (1898 – first at bat) and Bobby Bonds (1968 – third at bat) were the other two players to accomplish the feat.