Billy Hunter said the NBA dropped their offer to 47 percent of basketball-related income.
The owners claim to have moved to 50 percent, but they have made that move during two previous bargaining sessions.
"[Stern] snookered me. ... He made a move. He went to 47," said Hunter.
The NBA and NBPA are also at odds on system issues.
"We did what [Stern] said [he] needed and it was like their eyes got bigger," said Hunter. "They just wanted more and more."