Griffin said he didn't hear from the Clippers as trade talks were coming to a close, per ESPN's Nick Friedell.
"Finding out through Twitter, through other people, is a tough way to find out," Griffin said.
Griffin spent his first seven and a half seasons in Los Angeles, becoming a franchise icon for one that's had but a few. He was a five-time All-Star and made the All-NBA team on four occasions.
In the offseason, the Clippers signed Griffin to a max deal worth $171 million in guaranteed money. He was paraded around like a Clipper for life, with the franchise even staging a fake jersey retirement to show their commitment to him.
Griffin is averaging 22.6 points, 7.9 rebounds, and 5.4 assists this season. He'll make his Pistons debut Thursday.