Cowboys hold a narrow 52% edge in the season series market over a near-even tie outcome because they captured the Week 2 home matchup 37-20 behind Dak Prescott’s four touchdown passes and CeeDee Lamb’s 153 receiving yards. Washington’s 0-2 start and the dislocated left elbow suffered by Jayden Daniels on the final play of the first half create meaningful roster uncertainty for the Week 18 rematch at Northwest Stadium. Both clubs enter the second meeting after opening losses, with Dallas still addressing defensive inconsistencies and Washington relying on Marcus Mariota in the interim. Historical home/away splits and late-season variables such as playoff positioning keep the implied probabilities tightly bunched between a Cowboys sweep and a split.