When I was in high school, if the coach told us to do something we did it.From this, largely from Davis himself, it seems that he disagreed with the policy and decided he was going to ignore it.He's told that members of the girls teams don't like it. Instead of saying, "guys, some of the girls object so let's suck it up and keep the shirts on" he does nothing because, presumably, he doesn't care what the girls think.A week later, the AD told a runner to put his shirt on. After that Davis was told the rule (albeit not "professionally expressed"). The principal reported to the AD after that that it was violated again. Davis was then told ("warned") to enforce it. He tells team members that they might be thrown off if they ran shirtless again. Kid runs shirtless. AD goes nuts. Davis, who's allowed the runner to be put in this position by not enforcing the rule, intervenes and, from another article, is a smart-ass about it. Davis fired.
When asked if he would have done anything differently, Davis responded, "The reality is, I strongly disagree with what they were trying to enforce, and strongly disagree with the way they went about enforcing it. Am I supposed to be a puppet and bow down to the demands? A lot of people would say yes, but I disagree."
http://westwood.patch.com/articles/track-coach-hopes-to-discuss-firing-with-school-officials
It shouldn't have anything to do with how "successful" he is with respect to the times of the runners and their improvements.