Dennis Lawrence "Dan" McGann (July 15, 1871 – December 13, 1910) was an American professional baseball first baseman and second baseman. He played in Major League Baseball (MLB) for the Boston Beaneaters (1896), Baltimore Orioles (1898), Brooklyn Superbas (1899), Washington Senators (1899), St. Louis Cardinals (1900–1901), Baltimore Orioles (1902), New York Giants (1902–1907), and Boston Doves (1908). He was also a member of the 1905 World Series champions.\n', '

After beginning his professional career in minor league baseball in 1895, McGann played in MLB for the Boston Beaneaters (1896), Baltimore Orioles (1898), Brooklyn Superbas (1899), Washington Senators (1899), and St. Louis Cardinals (1900–1901) of the National League (NL) before jumping to the rival American League to play for the Baltimore Orioles in 1902. He returned to the NL, playing for the New York Giants (1902–1907) and Boston Doves (1908). In 1909–10, he played for the Milwaukee Brewers in the American Association.\n', '

McGann had a troubled personal life. He suffered from depression, and several members of his family committed suicide. After the 1910 season, with rumors of McGann signing with another minor league team, McGann committed suicide with a firearm.\n', '

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