A Chesapeake teenager has pleaded guilty in an attack on former NFL player Ed Beard.

The Virginian-Pilot reports 17-year-old Jalen Riddick pleaded guilty Monday in Chesapeake Circuit Court. In exchange, two charges of participating in gang activity were dropped.

Beard was riding his bicycle in his neighborhood last October when he came upon several youths fighting on a school baseball field. Police say when Beard tried to stop the fight, he was surrounded and some of the youths started hitting him.

Beard, who played for the San Francisco 49ers from 1965 to 1972, suffered a concussion, a black eye, cuts and bruises.

Another teen pleaded guilty in May to four felonies, including two gang charges. Three other teens are awaiting trial.