The 18-year-old student didn't report the assault until Monday afternoon, and only after he "sought advice from friends," according to the police report.
Workers at the UGA health clinic told the student Monday that he had a concussion, and he filed a police report the same afternoon. But police aren't sure what happened; the student was drunk at the time of the fight, and his friends filled in the details for him later.
The victim said he was at Bourbon Street bar on East Broad Street after midnight Saturday when three other men jumped him, according to police. Friends were helping him leave the bar when Moreno ran up and punched him once in the face, the student told police.
"We developed information through a third party that Moreno said that he was struck first," police Capt. Clarence Holeman said. "We're in the process of trying to obtain statements from everyone concerned, including Moreno."
Moreno, who was at the bar Saturday night, spoke voluntarily with investigators Tuesday afternoon at the Lexington Road police headquarters.
Moreno was a star player for the Bulldogs in the 2007 and 2008 seasons, and last year rushed for nearly 1,000 yards as a rookie with the Denver Broncos.