Joe O'Brien Field at Northeast Community Credit Union Ballpark

Joe O'Brien Field at Northeast Community Credit Union Ballpark in Elizabethton, TN, was the home of Elizabethton affiliated baseball from 1974 through 2019. After that and the Coronavirus pandemic-canceled 2020 season, MLB's 2021 Minor League Reorganization made the Rookie-Advanced Appalachian League a collegiate wood-bat circuit.

The Appalachian Mountains and Watauga River gave "The Joe" one of the minors' most picturesque settings. Opened in 1974, then-Riverside Stadium was renamed Joe O'Brien Field in 1980 for the man who landed the Twins. NCCU bought naming rights in 2019 but "Joe O'Brien" remained the field name.

With a population of just 14,000 and the smallest ballpark in Organized Baseball, the E-Twins had 12 league crowns in their 45 seasons, 15 division titles - including runs of six and five straight - and only nine losing campaigns. The city-operated club's run nearly ended with the 2017 season, but after playing that year in limbo the parties signed a five-year deal including a renovation in the 2018-2019 off-season. Coincidentally, the city turned it over to a contractor that season.

Among minor league teams not owned and operated by their parent club, the E-Twin/Twins partnership was, until the reorganization ended it, tied for the second longest in baseball - in a league in which half of the affiliations pre-dated this century.