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Vikings defensive end Spencer Nealy will serve a four-game suspension to begin the 2014 regular season after violating the NFL’s policy on performance-enhancing substances, the league said Friday.

Nealy, 24, spent part of the 2013 season on the Vikings’ practice squad. The club signed him to a reserve/future deal in December.

Nealy can take part in the Vikings’ training camp and preseason activities before serving his suspension. He can first return to an NFL roster on Monday, September 29.

The 6-foot-3, 295-pound Nealy played collegiately at Texas A&M. He had a stint with Detroit last year before joining Minnesota in August.