DNF's through the years

I haven’t had many DNF’s in my 33 years of racing, usually I wouldn’t race unless I’m (reasonably) healthy and once I start I almost always finish.  I have hurt myself in a couple of races but been able to finish (ask me about the time I passed out in the airport after an ultra).  Here are my six DNF’s.

10/05/79 Billerica, MA Vs. Tewksbury.  XC - Twisted ankle after 2m in 11:00
10/13/79 Boston, MA at Catholic Mem. XC - Sprained ankle, 2 weeks on crutches
05/28/83 Cape Giradeau, MO NCAA Track champs - Passed out at 2.25 miles
08/26/01 Cleder, France, 100km world champs - 5am start, 100% humidity, out at 67km
06/21/02 Torhout, Belgium, 100km world champs - DNF around 67km ended up in hospital
10/02/11 Harvard, MA, Apple ramble 10 mile - Pulled calf muscle just before 3m

1158 races over 6959 miles with a DNF rate of .4%