In the 2026 NFL preseason, roster health during training camp and the results of the April draft plus March free agency period stand out as primary drivers of implied probabilities for postseason qualification. Teams benefit from stable quarterback play, offensive line continuity, and defensive additions that address prior weaknesses, while injury reports and depth chart battles can quickly shift sentiment. The strength of schedule, divisional competition, and early preseason games offer the first on-field tests of readiness ahead of final roster cuts in late August. Historical patterns indicate that squads entering camp with minimal setbacks and strong recent drafting classes tend to see their postseason odds firm as the regular season approaches.