Oklahoma City rookie Terrance Ferguson has not played in a summer league game. He is awaiting to be cleared by FIBA. [PHOTO BY SARAH PHIPPS, THE OKLAHOMAN]

Terrance Ferguson, the Thunder's first-round pick in the 2017 NBA Draft, missed his second consecutive game of the summer league Monday. There's more to Ferguson's absence than an unsigned contract.

Unlike other prospects typically entering the NBA, Ferguson, 19, is coming off a season as a professional for the Adelaide 36ers in Australia. Players coming from overseas are required to get a letter of clearance from the International Basketball Federation (FIBA) in order to play, and Ferguson hasn't received his yet, a Thunder spokesperson told The Oklahoman on Monday.

There's no timetable for Ferguson's clearance, but it could exceed the length of the summer league, which concludes Thursday in Orlando.

Among the eight teams in the Orlando Summer League, only four have played their first-round picks thus far (Indiana forward T.J. Leaf, Orlando forward Johnathan Isaac, Detroit guard Luke Kennard, Miami forward Bam Adebayo). Charlotte guard Malik Monk and New York Knicks guard Frank Ntilikina are injured. Dallas guard Dennis Smith was unsigned as of Monday but is expected to play in Las Vegas on June 8, per the Mavericks.