The person spoke on the condition of anonymity because the deal had not been announced Monday.
The three-time slam dunk champion, who played at the University of Washington, regained his form with Golden State last season after playing in just four games with Oklahoma City the previous year following a midseason trade from Boston. The 5-foot-9 Robinson averaged 11.2 points and 4.5 assists for the Warriors.
He joins veteran Kirk Hinrich at the position as the Bulls try to get by without Derrick Rose. The former MVP is expected to miss a big portion of the season while recovering from knee surgery.
Hinrich is in his second stint with the Bulls after signing with them last week.
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