Is there a reason why, in American football, players are only allowed to wear their team's colors (i.e., no stripes or patterned shirts)? - Quora
Ranking NFL's current throwback jerseys: Eagles' perfect 'Kelly Green'; high marks for Patriots, 49ers
Embracing the team's history
World of Color — The Golden Angeleno
Ben Roethlisberger retiring might equate to the return to block numbers - Behind the Steel Curtain
Logos and uniforms of the Pittsburgh Steelers - Wikipedia
Throwback jerseys will be back this year, but what will the jersey be? - Behind the Steel Curtain
Steelers, can you please bring back block number uniforms?
Pittsburgh Steelers Reveal Updated Throwback Uniforms, Can, 45% OFF
Steelers throwback uniform looks just like Iowa's: Photo of new alternate
Embracing the team's history
Why Cole Holcomb could be the key to the Steelers' linebacking reboot - ESPN
Pittsburgh Steelers: How They Went from Pirates to Steelers, News, Scores, Highlights, Stats, and Rumors
The Steelers are unveiling new throwback uniforms but what will the be? - Behind the Steel Curtain