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Lions defensive tackle C.J. Mosley has been reinstated after serving nine days of a two-week suspension. (Melanie Maxwell | MLive.com)

ALLEN PARK -- The Detroit Lions said they were suspending C.J. Mosley two weeks.

Nine days later, he's back.

Coach Jim Caldwell announced Monday that the defensive tackle has been reinstated after serving nine days of a so-called "two-week" suspension.

Mosley did not miss a single practice, and only one game.

ESPN is reporting the defensive tackle was punished after being discovered with marijuana in his room at the team hotel in London. He deactivated a smoke detector, which alerted hotel staff to check the room.

Caldwell would not confirm nor deny the report, but he also did not correct a reporter who asked about what kind of message it sends the team to suspend a guy nine days for marijuana.

"What I think is that, without question, whenever we take an action, I think the team understands what we're trying to get accomplished," Caldwell said. "I've explained it to them, and we're moving forward."

Caldwell would not say whether Mosley is or was facing charges in England.

The incident reportedly occurred Oct. 24, after Detroit moved from its suburban training complex into the InterContinental in Central London. Mosley reportedly was discovered by hotel staff with the drugs,and Detroit sent him home a day later.

The Lions announced the suspension Oct. 25, a day before they beat the Atlanta Falcons 22-21 at Wembley Stadium in London.

Caldwell would not say who pulled the trigger on the suspension, saying the decision was arrived at collectively by the organization. But there is some question over the validity of their move.

Players who violate the drug policy are supposed to be disciplined by the league, and they are not subjected to a suspension until a fourth offense, per the collectively bargained policy.

Mosley and the NFLPA have filed a grievance over his lost wages, according to ESPN.

Detroit cited "conduct detrimental to the team" for suspending Mosley. Caldwell would not comment on the matter, nor whether he expects the NFL to discipline Mosley further.

"That's a league issue, NFLPA issue," Caldwell said. "And we're not going to comment on any of that further."

How disappointed was Caldwell that he had to send home a team leader the day before a game?

"It's an internal matter," he said. "We've handled it as such. We've stated our case clearly, and we're moving forward."

Mosley has not responded to requests from MLive for comment.

He is expected to start Sunday against the Miami Dolphins, with Nick Fairley sidelined by a sprained knee.

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