Fields is a luxury backup because he can force defenses to account for the quarterback as a runner. His most valuable Kansas City version is decisive: use the speed, take the simple throw and let the system create the harder answers.
Strengths: Starting experience, elite quarterback rushing history, physical talent, and clear No. 2 role.
Weaknesses: Passing consistency remains the swing skill, and he will have limited first-team reps behind Mahomes.