DR had run the TC Marathon 15 days earlier, so running at a highly reduced volume/intensity wouldn't be unusual. 2-4 mile runs are a typical at that point in the recovery phase (some even rest entirely) and two-a-days aren't common. The risk of injury is high.
Interesting, but my kids and their friends run marathons. They are running again the next day.
That may be true for older runners, but DR was 30 something then. Early 30's