The Dallas Cowboys call the undrafted free agents they sign after the draft their “second draft”, and not just because they think it’s a funny name for a bunch of no-name camp bodies they sign to fill up the roster.
They call it their second draft because the Cowboys don’t allow their scouts to “come off grade” after the draft. If they have a grade on a guy before the draft, they have to stick with it after the draft. Which means that after the draft, they try and sign every guy still left on their draft board, as the Cowboys feel those players effectively amount to extra draft picks.