Weaker Defense
Brady also enjoyed better defenses than Mahomes throughout his career. There’s no overstating how important that was to his longevity. Look at players like Andrew Luck and Joe Burrow who struggled with injuries. That’s because their teams didn’t protect them and keep them on the field.

This also puts more pressure on Mahomes because the team depends on his productivity. We’ve seen average quarterbacks like Joe Flacco and Nick Foles win Super Bowls because the defense stood firm. Brady is far beyond them but enjoyed more balanced teams during his time in New England (via Sporting News).