Charles, 29, has signed on for a recurring role, but details about his character are not yet known. TVLine first reported his casting.
Best known for his performance as outspoken high school football player "Smash" on Friday Night Lights for two seasons, Charles has recently guest-starred on NCIS and Pan Am and is recurring on Necessary Roughness as a more soft-spoken NFL player.
Grey's Anatomy returns to Thursdays this fall on ABC.
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