Why are you asking me? What makes you think he didnt expect to be drafted? I didnt see that in the article.
However, as someone who was in college between 64 and 69, I remember that all you had to do was register in college and you automatically got a college deferment. They eliminated the grad school deferment around 68 or so.
I believe it was 1970 or 71 that the draft lottery began. Luckily I drew #331 out of 365. Not sure what Edwards number was but if it was anywhere near mine he would have known he wouldnt be drafted.