BOSTON - MAY 13: LeBron James #23 of the Cleveland Cavaliers stands by in the fourth quarter against the Boston Celtics during Game Six of the Eastern Conference Semifinals of the 2010 NBA playoffs at TD Garden on May 13, 2010 in Boston, Massachusetts. The Celtics defeated the Cavaliers 94-85. NOTE TO USER: User Expressly Acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Elsa/Getty Images)
Mavericks owner Mark Cuban tweeted a link to the site Thursday, writing: "Gotta love Mavs fans!"
The home page plays a song and doctored photos include James' face on a J.R. Ewing picture and him dunking over the Dallas skyline.
The Mavs are a perennial contender with superstars in Dirk Nowitzki and Jason Kidd, with whom James won a gold medal in Beijing in 2008. The team could easily free up cap space for a sign-and-trade deal with the Cavaliers, who, if forced into a deal, would prefer sending the marquee free agent to the Western Conference. James also is a big Cowboys fan.