The Baltimore Mariners- Baltimore Mariners pro football team of the AIFA. www.baltimoremariners.com [2] The Baltimore Mariners are an indoor football team based in Baltimore, Maryland. The team was founded when the American Indoor Football Association expelled the Baltimore Blackbirds for negotiating with another league. The AIFA still holds the lease rights to 1st Mariner Arena, so the Mariners are the league's replacement. Schedule in March- end of June