NFL free agency: Steelers sign QB Mitchell Trubisky, will challenge Mason Rudolph
Mitch Trubisky to start at QB in Steelers' preseason opener – The Morning Call
QB won: Steelers newcomer Mitch Trubisky is Week 1 starter
Steelers QB Rudolph eyeing one last shot in Pittsburgh - The San Diego Union-Tribune
Steelers will start Mitch Trubisky at QB vs. Lions
Steelers: Mitchell Trubisky's future gets intriguing update
Trubisky starting QB, rookie Pickett the backup for Steelers
Mitch Trubisky to start at QB in Steelers' preseason opener
QB won: Steelers newcomer Mitch Trubisky is Week 1 starter