FNB Field is a baseball park located in Harrisburg, Pennsylvania. It was formerly known as Riverside Stadium (1987–2004), Commerce Bank Park (2005–2009), and Metro Bank Park (2009–2015). The park's current seating capacity is 6,187, and it is under the ownership of the City of Harrisburg while Harrisburg Senators Baseball Club, Inc operates the field. Construction began on August 12, 1986, and it was opened for the public on April 11, 1987, with a construction cost of $1.3 million. HOK Sport initially did the architecture of the building.

FNB Field is the Harrisburg Senators' home field, the Double-A minor league affiliate of the Washington Nationals. It also served as the former home for Penn FC of the USL from 2016 to 2018. The park underwent a renovation that began in 2008 and ended in 2010 with a $2.93 million construction cost. The renovation design was done by 360 Architecture. The original structure of the ballpark is a steel and aluminum structure. The stadium was also used as the spring training facility in the hit movie Major League II starring Tom Berenger, Charlie Sheen, and Corbin Bernsen.

Due to the FNB Field location so close to the Susquehanna River, it is prone to flooding. In a 1935 flood, the previous stadium at the site was washed out completely. The floods during the baseball season have been known to affect the Senators' schedule.