Coming off his second win of the Xfinity Series season, driver Sam Mayer had a little something on his mind. He hadn’t really been mentioned much as a potential candidate for one of the Cup Series seats that had or may come open, starting with the retirement of Martin Truex Jr. And that didn’t sit well. “Yeah, it kind of pisses me off, to be honest with you,” Mayer said after winning at Iowa. “I feel like we’ve proved ourselves a lot more. Like I’m dead serious. It makes me so mad that my name isn’t in more hats for race teams. So hopefully today kind of put my name in a couple of them. We’re …