The Colorado Mammoth are a professional box lacrosse team based in Denver, Colorado, that competes in the National Lacrosse League (NLL). The team has played its home games at Ball Arena since the 2003 season. They are owned by Stan Kroenke, who is also the owner of the Colorado Avalanche, Denver Nuggets, and the Colorado Rapids. The Mammoth franchise previously played as the Baltimore Thunder from 1987 to 1999, the Pittsburgh CrosseFire in 2000, and the Washington Power from 2001 to 2002. Up until the joining of the expansion team San Diego Seals, Colorado was the only non-Canadian team in the Western Division from 2014 to 2018. They have only missed the playoffs twice since moving to Colorado. In 2004 and from 2006 to 2008, the Mammoth lead the league in attendance. 2006 was the first year in the 20-year history of the NLL that the league had an attendance of more than one million fans in one season. The Mammoth had the honor of hosting fan number one million. In 2008, the Mammoth average attendance per game was higher than Pepsi Center's other teams, the Colorado Avalanche (NHL) and the Denver Nuggets (NBA).

2006 champions

In the 2006 season, the Mammoth went to the playoffs in the #2 seed in the Western Division. Round one was hosted in Colorado against rivals Calgary. The Mammoth won 18–17 in overtime. Brian Langtry scored the overtime goal. Round two (Western Division finals) was also hosted at Pepsi Center against the Arizona Sting. Rookie Dan Carey scored the winning goal as the Mammoth defeated the Sting 13–12. The championship game was held at HSBC Arena in Buffalo against the Bandits who held the league's best record and the incumbent league MVP, goaltender Steve Dietrich. The Mammoth won the Champion's Cup by a score of 16–9, with Gavin Prout being named Game MVP.

2022 champions

The Mammoth won the National Lacrosse League Cup beating the Buffalo Bandits 2 games to 1, with Dillon Ward being named the Finals MVP.

Notable players

Awards and honors

NLL Hall of Fame members

Current roster

All-time record

Playoff results

Head coaching history