Mike Tomlin expects Justin Fields to challenge Russell Wilson at quarterback.
Wilson leads due to experience, but Fields will compete.
Wilson, on a one-year deal, lacks long-term commitment.
Fields brings youth and potential beyond one season.
Steelers prioritise competition over promises.
Wilson's past success earns initial opportunity.
Fields offer excitement but need development.
Both will be thoroughly evaluated pre-season.
Steelers open to starting the better performer.
Top 5 Zodiac Signs for Pet Lovers
For More Webstories
Learn more