Miami Dolphins starting safety Reshad Jones was suspended without pay for the first four games of the season for violating the NFL performance-enhancing drug policy.

Jones issued a statement through the NFL Players Association, attributing his suspension to taking a banned substance unknowingly when he took a supplement.

“The NFL recently informed me that I tested positive for a substance that is banned under the NFL performance enhancing substances policy," Jones said. "I worked closely with the union to investigate what happened, and I learned that a supplement I took caused the positive test. I deeply regret not investigating the supplement carefully before I took it, and I will never again take a supplement without having it checked.

"I am very sorry for the effect of my mistake on my teammates and coaches. I apologize to them, Stephen Ross, the Dolphins organization and fans. During the time away from the team, I will maintain an intense training program so that I can help my team as soon as I return.”

He's eligible for reinstatement Sept. 29 following the Dolphins' game against the Oakland Raiders.

“I was very disappointed when we found out about Reshad’s suspension," Dolphins coach Joe Philbin said. "When we talked to him, Reshad pledged to learn from this situation. Our secondary as a unit, including Reshad, has performed well this offseason and I have complete confidence in the group as we progress through training camp and into the regular season."

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Aaron Wilson covers the Ravens for The Baltimore Sun