Rapoport reported Cooper's fifth-year option for $13.9 million comes off the books for Oakland.
Cooper has 22 receptions and 280 yards in six games this season, though the vast majority of that production came in just two games (10 catches for 116 yards against the Broncos and eight catches for 128 yards and a touchdown against the Browns).
The Cowboys (3-4) are now tied with the Philadelphia Eagles for second place in the NFC East behind the Washington Redskins (4-2), who beat Dallas 20-17 Sunday at FedEx Field.More news: US, Russian crew in Russian space center after failed launch
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The Eagles had been mention as possibly having interest in the talented wide receiver, but now their focus will shift to game planning to stop Cooper, whom the Eagles will face twice in the next five weeks. Through seven games, they rank 29th in passing offense with 183.1 yards per game. Over that same stretch, Devin Funchess, also 24 years old, has amassed 1,214 yards and 11 touchdowns, albeit on 33 more targets. He had no catches and was targeted just once in Oakland's loss to the Seahawks last week.
This will be the third time since 2000 the Cowboys have traded a top pick for a veteran receiver. The Raiders, coming off a bye week, are 1-5 as they head into a Week 8 matchup against the Indianapolis Colts. For his career, the fourth overall selection in 2014 has 225 receptions for 3,183 yards and 19 touchdowns.
Consistently one of the most frustrating players to own over the past three seasons, Cooper gets what amounts to be a much needed fresh start.