The NFL Players Association has filed a complaint against the Patriots over their treatment of Malcolm Butler during offseason workouts.

Butler, the second-year cornerback who was the hero of the Super Bowl when he intercepted Russell Wilson’s pass in the final minute, was reportedly sidelined from Organized Team Activities because he missed the first day when his flight to New England was canceled. Players are not supposed to be punished for missing voluntary work.

As a result, the NFLPA filed a complaint with the NFL Management Council, according to ESPN. The NFLPA has asked the Patriots to hand over all tape or other records from practices that would show player attendance and participation.

The report indicates that Butler himself is not involved in the complaint, and that the NFLPA is acting without Butler’s participation.