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Veteran wide receiver Amari Cooper, 31, has unexpectedly retired from the NFL, just one week after rejoining the Las Vegas Raiders. Cooper, originally drafted by the Raiders in 2015, cited difficulties ramping up his training upon his return. His nine-year career included stints with the Raiders, Cowboys, Browns, and Bills, accumulating over 1,000 receiving yards in seven seasons and earning five Pro Bowl selections. He leaves the game after a successful but ultimately short-lived return to his original team.

Prepared by Emily Rhodes and reviewed by editorial team.