2009–10 Colorado Avalanche season

The 2009–10 Colorado Avalanche season was the franchise's 37th season, 30th in the National Hockey League, and 14th as the Colorado Avalanche.

Off season
On June 3, 2009, the Avalanche began a complete overhaul of the coaching staff by firing head coach Tony Granato, along with assistants Jacques Cloutier and Dave Barr, goaltending coach Jeff Hackett, assistant to the general manager Michel Goulet, and video coordinator P. J. DeLuca. Also on June 3, the Avalanche hired Greg Sherman as their new general manager, replacing Francois Giguere, who had been fired in April. On June 4, Joe Sacco was hired to be the new head coach. Before Sacco's hiring, an offer had been made to former Avalanche goalie Patrick Roy to become the head coach, which Roy declined.

Regular season
On July 9, 2009, Avalanche captain Joe Sakic announced his retirement from the NHL after 20 seasons. The Avalanche retired Sakic's jersey #19 in a ceremony before the October 1, 2009 home opener of the 2009-10 season. On November 12, 2009, the Avalanche unveiled a new third jersey.

Playoffs
Key: Win  Loss

Skaters
Note: GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = Plus/Minus; PIM = Penalty Minutes

Goaltenders
Note: GP = Games Played; TOI = Time On Ice (minutes); W = Wins; L = Losses; OT = Overtime Losses; GA = Goals Against; GAA= Goals Against Average; SA= Shots Against; Sv% = Save Percentage; SO= Shutouts; G= Goals; A= Assists; PIM= Penalties in Minutes

†Denotes player spent time with another team before joining Avalanche. Stats reflect time with the Avalanche only.

‡Traded mid-season

Transactions
The Avalanche have been involved in the following transactions during the 2009–10 season.

Trades

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Draft picks
Colorado's picks at the 2009 NHL Entry Draft in Montreal, Quebec.

Lake Erie Monsters
The Avalanche's American Hockey League affiliate is the Lake Erie Monsters, based in Cleveland, Ohio.

Johnstown Chiefs
The Johnstown Chiefs of the ECHL were the Avalanche's second-tier affiliate.