Baltimore Mariners

The Baltimore Mariners were 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 maintained the lease rights to 1st Mariner Arena, so the Mariners were the league's replacement. On September 3, 2010, team owner Dwayne Wells was arrested on charges of wire fraud from an engineering firm he partially owned, allegedly using embezzled money from the firm to buy stakes in the Mariners franchise. Wells forfeited his ownership of the team, causing the Mariners to fold after the 2010 season. The Southern Indoor Football League, as successor to the eastern half of the AIFA, still holds the lease on 1st Mariner Arena.

On March 21, 2010, the Mariners became the first team in AIFA history to earn a shutout win, as they won over the Fayetteville Guard 59-0.

On April 24, 2010, Baltimore continued its record-setting performances during a 91-19 home win over the Guard. They would set the team record for most points in one half (59) and the most points in one game (91).

On June 26, 2010, Baltimore became the first team in AIFA history to finish the regular season undefeated with a record of 14-0. Baltimore went on to win the AIFA Championship and complete their undefeated season with a 57-42 victory on July 25th, 2010 over the Western Conference champions, the Wyoming Cavalry. In winning AIFA IV, the Mariners not only brought the city of Baltimore its first pro indoor football title, but also increased the city’s number of overall pro football championships to eight (Baltimore Colts [NFL] in 1958, 1959, 1968, and 1970, Baltimore Stars [USFL] in 1985, Baltimore Stallions [CFL] in 1995, Baltimore Ravens [NFL] in 2000, and Baltimore Mariners [AIFA] in 2010).

The coach of the undefeated 2010 Mariners, Chris Simpson, would move to the Richmond Raiders for the 2011 season.

Season-by-season
!Totals || 29 || 15 || 0
 * 2008 || 4 || 10 || 0 || 3rd EC Northern || --
 * 2009 || 9 || 5 || 0 || 2nd Northern || Lost Divisional (Reading)
 * 2010 || 14 || 0 || 0 || 1st Eastern || Won Divisional (Harrisburg)Won AIFA Championship Bowl IV (Wyoming)
 * 2009 || 9 || 5 || 0 || 2nd Northern || Lost Divisional (Reading)
 * 2010 || 14 || 0 || 0 || 1st Eastern || Won Divisional (Harrisburg)Won AIFA Championship Bowl IV (Wyoming)
 * 2010 || 14 || 0 || 0 || 1st Eastern || Won Divisional (Harrisburg)Won AIFA Championship Bowl IV (Wyoming)
 * colspan="2"| (including playoffs)

2010 season schedule
^ - indicates playoff game