Chicago Bears legend Steve McMichael -- who later became a pro wrestling star -- has been diagnosed with ALS and is already paralyzed from the shoulders down.
The 63-year-old -- who was a key part of the famous 1985 Bears championship team -- revealed the diagnosis to the Chicago Tribune ... admitting, "This ain't ever how I envisioned [my life] was going to end."
"Mongo" McMichael was a 5-time All Pro during his 14 year NFL career and was named one of the 100 Greatest Chicago Bears of All Time,.