Channing Frye smiles as he is introduced as a new Phoenix Suns basketball player during a news conference Tuesday, July 14, 2009, in Phoenix. (AP Photo/Ross D. Franklin

...after it was announced that he had signed with the Memphis Grizzlies NBA basketball team during a news conference in Memphis, Tenn., on Thursday, Sept. 10, 2009. (AP Photo/Lance Murphey

...Michael Heisley, after it was announced that he had signed with the NBA basketball team during a news conference in Memphis, Tenn., on Thursday, Sept. 10, 2009. (AP Photo/Lance Murphey

HEAD OVER HEELS

...and the most popular athlete since Muhammad Ali is expected to announce his retirement Wednesday at a news conference in Chicago, a source with close ties to the NBA told The Associated Press on Monday...

...of an NBA basketball game Monday, Dec. 21, 2009 in San Antonio. (AP Photo/San Antonio Express-News, Jennifer Whitney

...of an NBA basketball game Monday, Dec. 21, 2009 in San Antonio. (AP Photo/San Antonio Express-News, Jennifer Whitney

...of an NBA basketball game Monday, Dec. 21, 2009 in San Antonio. (AP Photo/San Antonio Express-News, Jennifer Whitney

...of an NBA basketball game Monday, Dec. 21, 2009 in San Antonio. (AP Photo/San Antonio Express-News, Jennifer Whitney

...Channing Frye smiles as he is introduced as a new Phoenix Suns basketball player during a news conference Tuesday, July 14, 2009, in Phoenix

John Kuester addresses the media during a news conference in Auburn Hills, Mich., Thursday, July 9, 2009, where he was introduced as the Detroit Pistons...

Good news for Gerald Henderson -- Duke (surprise!) has a strong history of producing pros

Minnesota Timberwolves' Kevin Garnett smiles as he enters a news conference, Wednesday, Oct. 1, 2003, in Minneapolis, where it was announced that he had signed a five...

Oklahoma sophomore and Associated Press College Player of the Year Blake Griffin smiles during a news conference where he announced that he will make himself eligible for this year's NBA draft, Tuesday...

John Paxson, executive vice president for the Chicago Bulls, smiles during a news conference on the NBA basketball team's media day, Monday, Oct. 1, 2007, in Deerfield, Ill

...talks with his father and former NBA player Dell, left, and coach Bob McKillop, center, after a news conference at Davidson College in Davidson, N.C., Thursday, April 23, 2009. Curry announced he would enter...