The suspension was announced while the team was in London to take on the Falcons. Mosley will not attend Sunday's game at Wembley Stadium and will instead be sent home. The Lions did not say which rule Mosley violated.
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Mosley, a sixth-round draft pick out of Missouri, has played every game this season, recording 2.5 sacks and one forced fumble. He is in the final year of a two-year deal.
The Lions are currently 5-2 and tied for first in the NFC North.
-- Alex Suskind