This is the second moped-related arrest in three months for Jok, who will be a sophomore for the Hawkeyes this fall.
Jok was charged with drunken driving on his moped in April and his license was revoked. Online court record show he pleaded guilty May 2 and completed a weekend drunken driving program.
Police arrested Jok again Monday night after initially stopping him for improper rear lights and lack of a safety flag.
The 6-foot-6 shooting guard averaged 4.4 points last season.