Daniel William Daub (January 12, 1868 - March 25, 1951) was a 19th century Major League Baseball pitcher born in Middletown, Ohio. After attending and playing baseball for Denison University, he played for the Cincinnati Reds in and with the Brooklyn Grooms/Bridegrooms from through .
The New York Times reported on December 22, 1895, that Dan was among approximately 20 men who stoned and fired shotguns, also known as whitecapping, upon the home of Mrs. Wescoe of Hamilton, Ohio. Daub, who passes his winters in Mintonville, Ohio, was also among those that had warrants issued for his arrest.
After his playing career was over, Dan became the coach of the Ohio Wesleyan University baseball team, a post he held for the season, then he resigned before the following season. His replacement was a ballplayer named Branch Rickey, who was recently ruled ineligible to play college ball due to his prior professional baseball career. Daub died at the age of 83 in Bradenton, Florida, and is interred at Hickory Flats Cemetery in Overpeck, Ohio.