Clemmens, 21, pleaded guilty May 25 to simple assault and disorderly conduct, both misdemeanors, and harassment, a summary offense.
He and three friends had drunkenly heckled Michael Vangelo, an off-duty police captain from Easton, Pa., and his two daughters - ages 15 and 11 - during the second game of the Phillies' home-opener series against the Washington Nationals in April.
After one member of Clemmens' group was ejected from the ballpark by security - at Vangelo's request - Clemmens left briefly, according to a statement prepared by Assistant District Attorney Patrick Doyle and agreed to by Clemmens. He later returned to the seats, taking a phone call, before declaring, "I gotta do what I gotta do. I'm going to get sick."
Clemmens then stuck a finger down his throat and vomited, striking Vangelo and the area in front of his daughters' seats, about 15 rows from the visitors' dugout.
As the girls fled from Clemmens - the 15-year-old consoling her sobbing sibling "like a mother," Vangelo said Friday - Clemmens accosted Vangelo with "four or five right hooks" near his left ear, bloodying his face. Vangelo did not fight back, he testified, because he did not want to risk being taken into custody in Philadelphia with his daughters so far from their Easton home.
His younger daughter refuses to return to the park or even discuss the incident, Vangelo added.
Before Vangelo spoke Friday, Phillies representative Salvatore DeAngelis had testified about the public relations hit suffered by the organization as a result of Clemmens' actions.