In February 2003, Jung was arrested in Honolulu, Hawaii, on charges of battery after slashing two men in a Korean restaurant when he was joining the Doosan Bears spring training camp.
On July 26, 2004, Jung was arrested on assault charges for hitting a man with a baseball bat in Haeundae-gu, Busan. He was arrested again on July 16, 2008, for allegedly punching two security guards and a policeman in Busan.
On August 31, 2009, Jung was involved in an altercation at a Karaoke club in Busan. The police was dispatched to the site after receiving a report that he was half-naked, intoxicated and swearing in a karaoke room, but Jung was not arrested. However, due to the controversy, he was released from the Lotte Giants on September 1, 2009. On September 15, 2009, Jung made an official announcement as to his retirement.
At approximately 4:40 a.m. on June 13, 2010, Jung was involved in a car crash at the intersection in front of Renaissance Seoul Hotel in Seoul where his BMW car crashed into another car. Because his breathalyzer test revealed a blood alcohol level of 0.12 percent, authorities arrested Jung at the scene for misdemeanor drunk driving.
