FLORHAM PARK, N.J. (AP) — New York Jets linebacker Brandon Copeland was suspended by the NFL for the first four games of the regular season for violating the league’s policy on performance-enhancing substances.

Copeland can still participate in the team’s pre-season practices and games. He is eligible to return to the active roster on Oct. 7.

In a post on Instagram, Copeland explained that he used a supplement that he believed adhered to NFL rules. Copeland hinted that he would appeal the suspension.