The 2011 season was the 25th in franchise history and 9th as the Mammoth (previously the Washington Power, Pittsburgh Crossefire, and Baltimore Thunder).
The Mammoth lost their first 5 games at home, continuing their home futility streak to 13 games before defeating the Boston Blazers in overtime.
They subsequently won their next two home games, and finished the season 5-11 and in 4th place in the West.
The Mammoth lost 10-6 to the Calgary Roughnecks in the Division Semifinal.
Reference: [1] x: Clinched playoff berth; c: Clinched playoff berth by crossing over to another division; y: Clinched division; z: Clinched best regular season record; GP: Games PlayedW: Wins; L: Losses; GB: Games back; PCT: Win percentage; Home: Record at Home; Road: Record on the Road; GF: Goals scored; GA: Goals allowedDifferential: Difference between goals scored and allowed; GF/GP: Average number of goals scored per game; GA/GP: Average number of goals allowed per game