May 11, 1971 In front of a sparse crowd of 2,9…

May 11, 1971

In front of a sparse crowd of 2,992 at Cleveland Stadium, Indians starter Steve Dunning hits a grand slam off A’s right-hander Diego Segui in the bottom of the second inning in Cleveland’s 7-5 victory over Oakland. It will be 37 years before another American League pitcher accomplishes the feat when Felix Hernandez of the Mariners does it against the Mets in 2008.