the oldest major league baseball park is the Fenway park the home of the Boston Red Sox
Currently, the oldest Major League Stadium in use is Fenway Park in Boston, Massachusetts.
Red sox or Yankees
Fenway park I think
The National League began play as a major league in 1876. The American League began play as a major league in 1901.
Still standing today the two oldest stadiums in major league baseball are: Fenway Park (Boston Red Sox), and Wrigley Field (Chicago Cubs)