The Nashua Pirates were a minor league baseball team, based in Nashua, New Hampshire. The team started in 1983 as the Nashua Angels, an affiliate with the California Angels in the Eastern League. The club changed affiliations in 1984 to the Pittsburgh Pirates and were then renamed the Nashua Pirates. The team's home ballpark was Holman Stadium.
During the mid-1980s, Harrisburg, Pennsylvania initiated a plan to construct a ballpark for a new Minor League Baseball team in the city. This ballpark, named Riverside Stadium, attracted the Pirates, which moved the Nashua affiliate to Harrisburg. The team was renamed the Harrisburg Senators, a nod to the previous Senators franchise.