The Concord Marines was the only moniker of the minor league baseball teams based in Concord, New Hampshire. Between 1886 and 1907, Concord teams played as members of the New Hampshire State League in 1886, New England League from 1902 to 1905 and New Hampshire League in 1907, winning the 1905 league championship. During a 1904 game, the Marines ran short on players due to illness and inserted their mascot, a 9 year old boy, into the game.