The Seattle Seahawks abruptly released cornerback Perrish Cox one day after he was signed following a four-game suspension for cornerback Walter Thurmond for violating the NFL substance-abuse policy.

The Seahawks cut him following his one-day stint on the roster.

They have filled the spot with DeShawn Shead

Shead was promoted from the practice squad to take over the vacancy created when Cox was released.

Follow me on Twitter: @RavensInsider

Aaron Wilson covers the Ravens for The Baltimore Sun.