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Hopefully cornerback Perrish Cox rented instead of buying in Seattle.

The Seahawks signed Cox on Tuesday after he worked out for the team in the wake of Walter Thurmond’s four-game suspension for violating the league’s substance abuse policy. With Thurmond out and Brandon Browner injured (and appealing a suspension of his own), it seemed Cox would be part of the team’s plan to deal with their thin ranks on the corner.

Call it buyer’s remorse or something else, but Cox won’t be part of that plan. The NFL’s daily transaction report brings word that the Seahawks waived Cox on Wednesday, which makes for about as short a stay that any player could have with a team.

The Seahawks have promoted defensive back DeShawn Shead from the practice squad to take Cox’s place on the roster. Shead has spent the last two seasons in the organization, spending most of his time on the practice squad.