The Kings officially announced today that big man Harry Giles, one of several rookies on the roster, won’t make his NBA debut until at least January, and possibly later. As James Ham of NBC Sports California details, Giles hasn’t suffered a setback, but Sacramento wants to be cautions with the prospect’s surgically repaired knees.

Although he’s just 19 years old, Giles has an extensive injury history, having torn his left ACL, MCL, and meniscus back in 2013. The young center also tore the ACL in his right knee in 2015, and then underwent a cleanup procedure on his left knee while at Duke last season.

Despite his knee injuries, Giles is viewed as a prospect with significant potential, and likely would’ve been a top-10 pick back in June if teams were more confident about his long-term health. The Kings, who were armed with three first-round picks, selected De’Aaron Fox and Justin Jackson before snagging Giles, so they could afford to gamble on the former Blue Devil’s upside at No. 20.