2. Stephon Gilmore
Signing Trevon Diggs to a long-term deal locks in him and Micah Parsons as an incredible core to this defense, but two players are obviously not enough.
The 32-year-old Gilmore is another guy who doesn't necessarily need a long-term deal, but he does need one that keeps him in Dallas beyond 2023.
He's not showing much sign of decline (though playing in Indianapolis for a year seemed to make people forget about him very quickly), and getting a couple more years of elite production out of him will be crucial to holding open the Cowboys' Super Bowl window.
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Getting a deal done now rather than waiting until next offseason could also help the Cowboys save some money. Gilmore's leverage is down a bit after not even making the Pro Bowl last year, but showing out under the big lights in Dallas would certainly put him back on everyone's radar as one of the game's elite defenders, and Pro Bowl or especially All-Pro honors this season would drive up the asking price. Better to act now, especially with how precious cap space is in Dallas right now.
And let's stay on the defensive side of the ball for the last one.