The 2020 Appalachian State Mountaineers baseball team represented Appalachian State University in the 2020 NCAA Division I baseball season. The Mountaineers played their home games at Beaver Field at Jim and Bettie Smith Stadium and were led by fourth year head coach Kermit Smith. On March 12, the Sun Belt Conference announced the indefinite suspension of all spring athletics, including baseball, due to the increasing risk of the COVID-19 pandemic.