Creiton Kinchen filed a lawsuit in a Dallas court Tuesday that claims Young hit him "suddenly and without provocation" at Club Onyx in Dallas, Texas.
Kinchen, the club's manager, says Young's request to convert $8,000 from a credit card into single dollar bills was refused, and a scuffle ensued.
Young was cited for misdemeanor assault during the June 12, 2010 incident, but said he was provoked and acknowledged he "made a mistake even being there."
The 28-year old Young is in his first year with the Eagles, and has not received much time on the field. He has appeared in just one game, throwing one pass, an interception.
During nine games last season with the Tennessee Titans, Young compiled a 98.6 QB rating, but experienced turmoil with coach Jeff Fisher. Fisher told the Titans he would not return to the team if Young remained on the roster.