The latest NBA rumors involve mounting Jimmy Butler trade speculation, a new Warriors starting lineup, and the Bulls' Nikola Vucevic asking price.

The NBA's trade season unofficially starts on Sunday, Dec. 15, when a majority of players that signed contracts in the offseason will become trade eligible for the first time this season.That doesn't necessarily mean that there will be a flury of trades between now and the NBA trade deadline on Thursday,

It's worth remembering that Butler entered the season without the extension he'd hoped for, creating enough daylight between himself and Miami's front office to raise eyebrows across the NBA, and push speculation that Butler might be a viable and important trade target.