Just a little food for thought..
3 LA Rams players developed ALS, statistically unusual.
Bob Waters, Matt Hazeltine, Gary Lewis.
Looking for a link it was determined that Milorganite was used on the playing field.
Here’s part of an article..dated 1987
http://www.time.com/time/magazine/article/0,9171,963607-1,00.html
....In Waters’ case, however, this seemingly random stroke of misfortune soon began to look like a clue to a medical mystery. Shortly after his diagnosis, Waters learned that his former teammate Matt Hazeltine, a linebacker, had also been stricken with ALS. Last December Waters heard of a third ALS casualty from the 1964 squad — Fullback Gary Lewis. Both Hazeltine and Lewis died earlier this winter. Waters was stunned. Was it mere coincidence?..
Should have added that a definite link was NOT found (as of 1987)but several other cluster cases seem to point to heavy metals possibly being a trigger.
As I understand it Milorganite is baked pretty good to kill all the nasty things in poop/sewage ,, up to the hardest thing to kill hepatitis ,, I’m not an expert but I’d suspect dirty needles from the team doc spreading the disease as they were all on a single year team ...