The Colorado Mammoth placed forward Ryan Lee on the Injured Reserve List from the Active Roster.
The Colorado Mammoth placed defenseman TJ Comizio on the Active Roster from the Evaluation List.
The Colorado Mammoth placed forward Jack Hannah on the Active Roster from the Evaluation List.
The Colorado Mammoth placed Practice Player defenseman Brian Simmons on the Practice Player List from the Active Roster.
The Colorado Mammoth signed defenseman TJ Comizio to a one-year contract agreement and placed him on the Evaluation List from the Protected Player List.
The Colorado Mammoth have released forward Ben McDonald from the Active Roster.
The Colorado Mammoth have placed Practice Player defenseman Brian Simmons on the Active Roster from the Practice Player List. (maintain Practice Player Tag)
The Colorado Mammoth acquired forward Jack Hannah from the Las Vegas Desert Dogs in exchange for a compensatory first-round selection in the 2026 NLL Entry Draft, a first-round selection in the 2027 NLL Entry Draft and a second-round selection in the 2028 NLL Entry Draft.
The Colorado Mammoth released Patrick McIntosh from the Draft List.
The Colorado Mammoth signed Restricted Free Agent forward Jack Hannah to a three-year agreement. The Las Vegas Desert Dogs have 72 hours to match the offer as per CBA 7.1 D to retain the rights of the player.
The Colorado Mammoth placed forward Andrew Kew on the Injured Reserve List from the Active Roster.
The Colorado Mammoth placed defenseman Ari Stevens on the Active Roster from the Injured Reserve List.
The Colorado Mammoth placed Practice Player goaltender Kaleb Martin on the Practice Player List from the Active Roster.
The Colorado Mammoth placed Practice Player forward Jameson Bucktooth on the Active Roster from the Practice Player List (maintain Practice Player tag).
The Colorado Mammoth placed Practice Player defenseman Brian Simmons on the Practice Player List from the Active Roster.
The Colorado Mammoth placed Practice Player goaltender Kaleb Martin on the Active Roster from the Practice Player List (maintain Practice Player Tag).
The Colorado Mammoth placed Practice Player defenseman Brian Simmons on the Active Roster from the Practice Player List (maintain Practice Player tag).
The Colorado Mammoth placed Practice Player forward Jameson Bucktooth on the Practice Player List from the Active Roster.
The Colorado Mammoth signed defenseman Brian Simmons to the Practice Player List
The Colorado Mammoth released forward Jameson Bucktooth from the Active Roster.
The Colorado Mammoth signed forward Jameson Bucktooth to the Practice Player List and placed him on the Active Roster (maintain Practice Player Tag).
The Colorado Mammoth signed goaltender Kaleb Martin to the Practice Player List.
The Colorado Mammoth released goaltender Kaleb Martin, defensemen Reese Barnes, AJ Mercurio and Ben Stewart from the Active Roster.
The Colorado Mammoth placed defensemen Brett Craig and Ari Stevens on the Injured Reserve List from the Active Roster.
The Colorado Mammoth released defenseman Zack Goorno from the Draft List.
The Colorado Mammoth placed goaltender Ethan Robertson on the Hold Out List from the Active Roster.
The Colorado Mammoth placed forward Asher Nolting on the Protected Player List from the Hold Out List.
The Colorado Mammoth released forward Aaron Woods, forward Sebastian Simonson, defenseman Brian Simmons and defenseman Nathan Woods from the Active Roster.
The Colorado Mammoth released forward Kaymen Diabo from the Physically Unable to Perform List.
The Colorado Mammoth acquired a second-round selection in the 2026 NLL Entry Draft from the Philadelphia Wings in exchange for forward Brian Cameron and a fourth-round selection in the 2026 NLL Entry Draft.
The Colorado Mammoth released defenseman Jake Harrington and forward Zach Terry from the Active Roster.
The Colorado Mammoth have placed forward Kaymen Diabo on the Physically Unable to Perform List from the Active Roster.
The Colorado Mammoth signed defenseman Ben Stewart to a three-year contract agreement.
The Colorado Mammoth acquired a compensatory first-round selection in the 2026 NLL Entry Draft in exchange for forward Connor Robinson.
The Colorado Mammoth signed defenseman Warren Jeffery to a two-year contract agreement.
The Colorado Mammoth signed forward Connor Robinson to a one-year contract agreement.
The Colorado Mammoth signed defenseman Conner Cook and defenseman Owen Down to two-year contract agreements.
The Colorado Mammoth signed defenseman Ari Stevens, defenseman Nathan Woods, defenseman Brian Simmons, faceoff specialist Matthew Paolatto, defenseman Jake Harrington, forward Kaymen Diabo, forward Sebastian Simonson, forward Zach Terry, goaltender Ethan Robertson, defenseman AJ Mercurio, defenseman Dylan Hess, defenseman Resse Barnes, forward Braedon Saris, defenseman Connor Nock and forward Jameson Bucktooth to three-year contract agreements.
The Colorado Mammoth signed forward Owen Rahn, goaltender Nathan Whittom, forward Brian Cameron, forward Dylan McIntosh, forward Thomas Vela, forward Ben McDonald and defenseman Jalen Chaster to two-year contract agreements.
The Colorado Mammoth signed goaltender Kaleb Martin to a three year contract agreement and placed him on the Active Roster from the Physically Unable to Perform List.
The Colorado Mammoth acquired forward Andrew Kew, a second-round selection in the 2026 NLL Entry Draft and a conditional second-round selection in the 2028 NLL Entry Draft from the Georgia Swarm in exchange for forward Connor Kelly and a protected first-round selection in the 2026 NLL Entry Draft.
The Colorado Mammoth signed defenseman Robert Hope to a one-year contract agreement.
The Colorado Mammoth signed defenseman Tim Edwards to a one-year contract agreement.
The Colorado Mammoth signed defenseman Jordan Gilles to a two-year contract agreement.
The Colorado Mammoth signed forward Aaron Woods to a two-year contract agreement.
The Colorado Mammoth acquired forward Dylan McIntosh from the Vancouver Warriors in exchange for a second-round selection in the 2026 NLL Entry Draft and a third-round selection in the 2028 NLL Entry Draft.
The Colorado Mammoth placed faceoff specialist Nathan Laliberte on the Protected Player List from the Hold Out List.
The Colorado Mammoth placed defenseman TJ Comizio on the Protected Player List from the Active Roster.
The Colorado Mammoth placed forward Stuart Phillips on the Draft List.
The Colorado Mammoth placed defenseman Joe Juengerkes on the Draft List.
The Colorado Mammoth placed defenseman Christopher Davis on the Draft List.
The Colorado Mammoth placed defenseman Kai George on the Protected Player List from the Physically Unable to Perform List.
The Colorado Mammoth released forward Tyson Gibson from the Active Roster.
The Colorado Mammoth acquired forward Brian Cameron and a fourth-round selection in the 2027 NLL Entry Draft from the Toronto Rock in exchange for a second-round selection in the 2027 NLL Entry Draft.
The Colorado Mammoth acquired a first-round selection (10th overall) and a second-round selection (28th overall) in the 2025 NLL Entry Draft from the Rochester Knighthawks in exchange for forward Zed Williams and a second-round selection (24th overall) in the 2025 NLL Entry Draft.
The Colorado Mammoth made a Qualifying Offer + to Jalen Chaster, TJ Comizio, Connor Robinson, Tyson Gibson and Warren Jeffrey as per Section 7.1 of the CBA.