After they left, I took a quick peek from the 1973 issues and found an article in the January issue about the new upcoming racing shoe being developed by Bill Bowerman and Geoff Hollister that featured a spikeless outsole. Their test results showed most of the top runners who wore them ran very well in them, better than expected, plus the shoes were more comfortable than their spiked counterparts. What they developed was a shoe that had the best of both worlds, a good amount of traction, plus an outsole that could be used on the road, grass, dirt or track. 36 years ago, the Nike Waffle Racer was introduced. The shoe coach Bowerman destroyed his wife’s waffle iron developing. A pretty significant shoe in the history of competitive shoe development.
Here’s the article on the development of the Waffle outsole for Blue Ribbon Sports from the January 1973 issue of Runner’s World and also an ad for the final production of the Nike Oregon Waffle Racer from the December 1973 issue of Runner’s World.