Antonio Callaway has received a four-game suspension for violating the NFL's substance abuse policy.

Callaway had been working with the reserves of the Cleveland Browns in training camp.

“I take full responsibility for my actions,” Callaway said in a statement. “I made a mistake and I own that. I have taken steps to make myself better and I appreciate the Browns standing by me and supporting me during this time. I know there’s nothing I can say to regain trust; it will all be about my actions.”

Callaway had 43 receptions for 586 yards and five touchdowns as a rookie last season.