Did Lou Gehrig really have ALS?

From today’s NY Times here.  Money quote:

A peer-reviewed paper to be published Wednesday in a leading journal of neuropathology, however, suggests that Gehrig’s demise — and that of some other athletes and soldiers given a diagnosis of amyotrophic lateral sclerosis, commonly known as Lou Gehrig’s disease — might have been catalyzed by injuries only now becoming understood: concussions and other brain trauma