Each will cost $1.545 million per player.
Wide receivers Sam Hurd and Miles Austin, defensive end Stephen Bowen and guard Cory Procter were tendered offers.
The Cowboys chose not to send tight end Tony Curtis a contract, which means he set to test the free agent market beginning Friday.
The four players extended tenders can still receive offers from other teams but those teams must be willing to give up a second round pick as compensation.
Cowboys place RFA tenders
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