OLYMPIA FIELDS, Ill. -- The last time he was yards away from a playing field, William Ligue Jr. ran onto it, approached the first-base coach of the Kansas City Royals from behind and attacked him.
On Sunday, Ligue was spotted working at the U.S. Open outside Chicago as part of a cleaning staff, wearing a credential that gave him access to many of the courtesy tents surrounding the players' clubhouse and put him a few dozen yards away from the first tee.
No one, he insisted, was in harm's way.
"I'm no security risk, I'm no threat to society," Ligue said Sunday.
Ligue, 35, told a reporter he is a changed man since the night of Sept. 19, 2002, when he and his teenage son gained national notoriety after running onto the field at Comiskey Park and attacking Tom Gamboa during the White Sox-Royals game.
Ligue, who last month changed his plea to guilty on two counts of aggravated battery, will be sentenced Wednesday. His punishment could range from probation to up to five years in prison.
Ligue was one of the thousands of workers employed by vendors for the U.S. Open, but one official said Sunday that she was unaware of his role in the Comiskey attack.
"I did not know that and it does concern me a little," Nancy Bennett, the manager of U.S. Open admissions, said.
Ligue's son, released to his mother's custody, has been sentenced to five years' probation and 30 hours of community service. Before his sentencing, Gamboa advocated probation rather than prison for the youth.
Ligue's change of plea was unexpected and not part of a plea agreement, a spokeswoman for the Cook County state's attorney's office said last month.
Information from The Associated Press was used in this report.