Sacramento continues its fight to keep the Kings from relocating.

The Maloofs have signed a deal with a group based in Seattle that plan to move the Kings there for the 13-14 NBA season.

"It's going to be a very difficult decision for the board of governors if Sacramento comes up with an offer," said David Stern on Thursday.

Stern said that expansion isn't really an option for the NBA at this point, though it could change after his 2014 retirement.