**Aaron Donald’s strong physical conditioning after two years away, multiple recent Rams workouts, and the team’s loaded roster create the core drivers behind the 83.5% implied probability that he signs before the 2026 regular season.** At 35, the three-time Defensive Player of the Year has maintained elite conditioning through a strict regimen mirroring his playing days and has completed official tryouts in August 2026, with reports indicating he feels good and continues training. Coach Sean McVay has repeatedly stated the door remains open, noting Donald has “earned the right” to decide on his terms without pressure, while the Rams prepare contingency rosters. The franchise’s aggressive win-now approach—highlighted by the acquisition of reigning Defensive Player of the Year Myles Garrett and All-Pro corner Trent McDuffie—adds appeal for a potential Super Bowl run at home in SoFi Stadium. Contract details (including a reactivated or renegotiated deal) and roster timing represent variables, yet the combination of Donald’s fitness, ongoing interest, and the Rams’ championship window supports the market’s assessment of a high likelihood he un-retires and signs. Historical precedents for late-career returns by Hall of Fame-caliber players further contextualize the competitive but favorable setup.