Were the Philadelphia Athletics a semi-pro or pro team?

Answer:
There have been several professional baseball teams called the Philadelphia Athletics:

1) The current Oakland Athletics American League team played as the Philadelphia Athletics between 1901-1954.
2) There was a team in the National League in 1876 known as the Philadelphia Athletics.
3) There was a team in the American Association known as the Philadelphia Athletics between 1882-1891.
4) There was a team in the Players League in 1890 known as the Philadelphia Athletics.
5) There was a team in the first Major League, the National Association, known as the Philadelphia Athletics between 1871-1875.

First answer by Dlmick. Last edit by Dlmick. Contributor trust: 4856 [recommend contributor recommended]. Question popularity: 36 [recommend question].