Which other legendary Pittsburgh Steelers numbers should be retired?

Two Immaculate Reception Events Cancelled Friday; Steelers Still Intend To Retire Franco Harris' Jersey Saturday (Update) - Steelers Depot

Who were the most notable Steelers to wear No. 55? - Behind the Steel Curtain

Which Steelers jerseys should be permanently retired?

I hope this pushes the organization to give their legends their official flowers sooner. Steelers history is far too rich to only have 2 Jerseys officially retired. Franco should of had this

Steelers' Ben Roethlisberger dealing with pectoral injury

Steelers retire Harris' No. 32

Men's Pittsburgh Steelers Franco Harris Nike Black Game Retired Player Jersey

Steelers fans gather for 50th anniversary of Franco Harris' 'Immaculate Reception' after his death

Pittsburgh Steelers Are Staging A Long-Awaited Immaculate Remembrance

Ben Roethlisberger's delayed retirement has put Pittsburgh Steelers in tricky position

Should the Steelers stop after retiring Franco Harris' No. 32 or add more numbers to the list?