Which team is older Cubs or White Sox?

Which team is older Cubs or White Sox?
The Cubs are one of two major league teams based in Chicago; the other, the Chicago White Sox, is a member of the American League (AL) Central division. The Cubs, first known as the White Stockings, were a founding member of the NL in 1876, becoming the Chicago Cubs in 1903.

Chicago Cubs

Mascot(s)
Clark the Cub

The Cubs are one of two major league teams based in Chicago; the other, the Chicago White Sox, is a member of the American League (AL) Central division. The Cubs, first known as the White Stockings, were a founding member of the NL in 1876, becoming the Chicago Cubs in 1903.

Chicago Cubs
Mascot(s) Clark the Cub