This news follows the announcement that the team had waived center Norvel Pelle, seemingly making room for another big man at camp.
Cacok, 25, is 6-foot-7 and appeared in 15 games with the Spurs last season. He spent the first two years of his career with the Lakers, playing 21 games in LA.
He was also signed and waived by the Nets in training camp last October and has spent time in the G League.
An Exhibit 10 contract counts toward the offseason roster of 20, but not toward the regular-season roster unless the player is signed to a standard deal.