Wisconsin Judge Paul Malloy ordered the 38-year-old actor to report to jail on Sunday, according to the Associated Press, for the guilty misdemeanor verdicts of carrying a concealed weapon and of disorderly conduct that came back last month after a three-day trial.
Diamond was also found not guilty of reckless endangerment, which is a felony.
At the time of the guilty verdicts on May 30, Diamond's lawyer said, "We’re happy with the results, we think that justice has been done. The jury did a good job."
Diamond allegedly stabbed a 25-year-old man in a Milwaukee bar on Christmas Day, and was arrested the next morning, according to the police report.
During the trial, Diamond testified that his girlfriend, Amanda Schutz, was involved in a skirmish with a small group at the time of the incident and that he was just trying to protect her. For her part in the fight, Schutz was found guilty of disorderly conduct.
Diamond admitted that he had a pocket knife, but said he only showed it to people at the bar, hoping to scare them off.
"I was fearing for her safety and her life," he said.
The victim himself added that he never saw a knife and could not confirm that the actor stabbed him. According to the police report, he found out he was stabbed long after the incident.
The Associated Press contributed to this story.