A day after saying the franchise had decided to bring Stephen Jackson back to the Bay Area, Warriors general manager Larry Riley traded the much-maligned swingman to San Antonio for small forward Richard Jefferson and a conditional first-round pick.

Riley has long expressed an interest in adding another draft pick. The Warriors lose their first-rounder to Utah, if it’s not among the top seven, and have New Jersey’s second-rounder. By taking on Jefferson’s contract, which includes an $11 million player option for 2013-14, the Warriors were able to grab the Spurs’ 2012 draft pick.

Warriors sources are “confident” that they’ll get the pick.

The Warriors also purchased a second-round pick from the Atlanta Hawks, who are trying to pay their luxury tax bill. The Hawks have two second-round picks, having acquired one from Phoenix, and Golden State will receive the lower of the two.

More to come …