According to a source speaking to the Associated Press, Joe Sakic will announce Thursday that he will retire from the Colorado Avalanche after 20 seasons.The Avs have called a press conference for 1 p.m. on Thursday, at which Sakic will make his decision public. The team would not say anything about the rumors other than that "Sakic will make a special announcement regarding his hockey career."Some othere reports have said he's coming back for one more season and will play for Canada in the Olympics.Be sure to watch the press conference live on TheDenverChannel.com.Sakic, the Colorado Avalanche's longtime captain, has led the team to two Stanley Cup titles and is 13-time All-Star.Sakic turned 40 on Tuesday. He has been the face of the franchise since the team relocated to Denver from Quebec in 1995. He teamed with Patrick Roy, Peter Forsberg and Adam Foote to capture the Stanley Cup in 1996 and 2001.It's been a storied career for Sakic, who's won championships and league MVP honors, and led Team Canada to an Olympic gold medal in 2002.