David Daniel Eggler (April 30, 1849 – April 5, 1902) was a Major League Baseball center fielder. He was born in Brooklyn, New York.
Eggler's career began in the National Association of Base Ball Players with the New York Mutuals in 1868, and was a member of the Mutuals when they joined the professional National Association in 1871. He went on to play for the Philadelphia White Stockings and Athletic of Philadelphia in the NA.
After the formation of the National League, Eggler remained with Philadelphia, then went on to play for the Chicago White Stockings, Buffalo Bisons, and Baltimore Orioles before his career ended.
He died after being hit by a train in Buffalo, New York.