In addition Martin's suspension, his production has declined this season, and he is also one failed-test away from a 10-game suspension.

Martin explained Wednesday in a statement on the team's official site that he will not appeal and will enter a treatment facility. For athletes, it's like an amphetamine that can boost energy and sharpen focus.

Rapoport said sources shared with him that the suspension is specifically for using Adderall, and that it is "part of the issues [Martin is] battling".

Martin, a Pro Bowl performer last season, was a healthy inactive for the Buccaneers' Week 16 loss to the New Orleans Saints. At the time, Koetter said only that it was a "coach's decision".

"Doug has been a valued member of our organization for the past five seasons and we respect and support his decision to seek help", Licht's statement read.

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Asked how Martin's absence would affect the team on the field or as a distraction, Koetter said, "Zero".

Martin had a breakout rookie season with 1,454 rushing yards and 11 touchdowns in 2012, but injuries hampered him in 2013 and 2014. Martin signed a five-year, $35.75 million contract, with $15 million guaranteed, in the offseason after finishing second in the National Football League in rushing in 2015 with 1,402 yards.

"Right now, I'm not going to say anything about who's going to play this week because I don't want to do Carolina any favors as to who we're going to play", Koetter said. "But I'm sure he'll come back and have a strong year next year".

Winston said he wants to support his friend. "I'm not anxious about his situation", Winston said before practice Wednesday.