Robert Daniel Emslie (January 27, 1859 – April 26, 1943) was a Canadian pitcher in Major League Baseball (MLB) who went on to set numerous records for longevity as an umpire.

[1] Born in Guelph, Ontario, Canada, Emslie had a brief professional playing career with the Baltimore and Philadelphia clubs in the American Association.

Emslie was nicknamed "Wig" due to his premature receding hairline, which was a result of the stress of umpiring games single-handedly in the rough-and-tumble 1890s; he was derisively called "Blind Bob" by the New York Giants following his role in the infamous "Merkle's Boner" play during the 1908 National League pennant race.

[1] In 1885, Emslie's numbers greatly decreased with Baltimore, reportedly due to a sore arm, attributed to his excessive use of the curveball, at which he was moved to the Philadelphia Athletics also of the American Association.

The third no-hitter came on September 18, 1903, by Chick Fraser of the Philadelphia Phillies, and the fourth was tossed on May 8, 1907, by Francis "Big Jeff" Pfeffer of the Boston Doves.

Later, Emslie showed up at a Giants' practice with a rifle, placed a dime on the pitching mound and shot it from behind home plate, sending the coin spinning into the outfield.

Emslie was also president of the Canadian Grand International Trap Shoot, notably in charge of a large meet in St. Thomas, Ontario in December 1916.