More bets have been placed on the Cleveland Cavaliers to win the 2015 NBA title than on any other team at the Las Vegas Superbook.

LeBron James hasn't committed to return to the Cavaliers. But some betting money sure has. Brian Babineau/Getty Images

"They are our biggest liability right now," said MGM VP of Race and Sports Jay Rood. "We took a dime ($1,000) on them at 40-1."

The Cavs are currently down to 10-1 at the MGM.

The story's the same all over Vegas, as reports surfaced about LeBron James' potential interest in returning to Cleveland. Las Vegas Superbook assistant manager and head NBA oddsmaker Jeff Sherman told ESPN.com that none of the bets on the Cavs have been "significant" in size, but, altogether, the wagers were enough to cut Cleveland's odds in half, from 60-1 to 30-1.

The defending champion San Antonio Spurs (9-2) and the Chicago Bulls (7-1) are the only teams that have attracted more money than the Cavaliers, but no team has received more overall bets (28) than Cleveland since odds went up on June 9. In comparison, the Miami Heat, the favorite at 5-2, had attracted only one bet at the Superbook.

Sherman cautioned that the NBA futures pool is only a month old, however. And some sports books, notably the Wynn, are not taking bets until free agency shakes itself out.

William Hill U.S. director of bookmaking Nick Bogdanovich said in a text message that his shop also had seen a recent influx of betting interest on the Cavs, "but nothing over the top." It's been enough, though, to shorten Cleveland's championship odds from 50-1 on June 16 to 20-1 currently at William Hill's Nevada book.

If James were return to Cleveland, where he spent the first seven seasons of his NBA career, Sherman said he would adjust the Cavs' odds to around 8-1.

"They are such a young team," Sherman said of the Cavaliers. "They would be better positioned for the next season than this upcoming one."