The 26-year-old point guard spent last season with Santa Cruz in the G League, where he averaged 18.0 points, 8.1 assists and 2.1 steals in 46 games. Those numbers put him fourth in the league in assists and fifth in steals.
Pressey signed with the Celtics after going undrafted in 2013 and spent his first two NBA seasons in Boston. After being waived in 2015, he briefly signed with the Trail Blazers, then was claimed off waivers by the Jazz, but never played for either team. He had short stays with the Sixers and Suns during the 2015/16 season.
He signed with the Warriors last September, but was waived before the season started and was in the G League for the entire year.