Riley Cooper was fined by the Eagles for conduct detrimental to the team. Cooper categorized the fine as "substantial."
According to Article 42, Section 1A-15 of the Collective Bargaining Agreement (h/t to Albert Breer of NFL Network here in the Eagles' media room), Cooper cannot be fined more than one game check:
Conduct detrimental to Club—maximum fine of an amount equal to one week’s salary and/or suspension without pay for a period not to exceed four (4) weeks. This maximum applies without limitation to any deactivation of a player in response to player conduct (other than a deactivation in response to a player’s on-field playing ability), and any such deactivation, even with pay, shall be considered discipline subject to the limits set forth in this section. The Non-Injury Grievance Arbitrator’s decision in Terrell Owens (Nov. 23, 2005) is thus expressly overruled as to any Club decision to deactivate a player in response to the player’s conduct.
Cooper is making $630,000 this season, so his fine will not exceed roughly $37,000, based on the above verbiage.