The National Football League has suspended Minnesota Vikings defensive lineman Spencer Nealy for the first four games of next season for violating rules against performance-enhancing drugs.

The league announced the suspension on Friday. Nealy will not be paid during his suspension, but he is eligible to participate in all practices, off-season programs and pre-season games.

Nealy was a member of the Vikings practice squad for six weeks last season. If he makes the team, he will be eligible for the Vikings' active roster on Sept. 29.

Nealy says he took a supplement with a banned stimulant. He says he takes responsibility for his actions and apologized to the organization and fans for the suspension.