That honor goes to Rickwood Field in Birmingham, Alabama. It was built in 1910, and over the years it hosted teams from the multiple minor leagues, the Negro Southern and Negro National Leagues, and Major League Baseball spring training. It still hosts occasional games today, most notably the annual Rickwood Classic.The oldest ballpark in the MLB, of course, is Boston’s Fenway Park, which was built in 1912. Chicago’s Wrigley Field, built in 1914, is the only other MLB stadium in the 100+ years club.