The NFL has since officially confirmed the violation. Here is the NFL’s statement:

The Seahawks will forfeit its first two days of on-field double practices during its 2015 mandatory minicamp for veteran players and will be permitted a single 2 ½-hour on-field practice session on the final day of its minicamp. Seahawks players will be paid for the cancelled practice sessions. The violation was for permitting the club’s players to engage in excessive levels of on-field physical contact during the team’s 2014 mandatory minicamp for veteran players.



IF this makes Pete Carroll a "Cheater", I can live with it.