George Zettlein

George Zettlein (July 12, 1844 – May 22, 1905) was an American professional baseball pitcher, right fielder and first baseman. He played six seasons in Major League Baseball from 1871 to 1876 for the Chicago White Stockings, Troy Haymakers, Brooklyn Eckfords, Philadelphia White Stockings of the National Association (NA), and the Philadelphia Athletics (1860–1876) of the National League.

Zeittlein served in the American Civil War, in both the Army and Navy. He began playing baseball in 1865 for Eckford of Brooklyn in the National Association of Base Ball Players, the amateur-only predecessor to the NA. He joined the Brooklyn Atlantics in 1866, and remained with the team until 1870.

In 1871, Zettlein joined the professional White Stockings of the NA, and in May 1871 he gave up the new league's first home run. He gave up the league's first grand slam in September.