All Nike athletes that live in Oregon wear the OTC jersey. Nike is trying to brand "OTC" . Rupp does not train with OTC in Eugene at all.
There's OTC Portland and OTC Eugene. The Portland group like Rupp, Ritz, Webb, Begley and the Gouchers are OTC/Portland. They're all sponsored by Nike so you could say they're "Nike runners" or you could say they're "OTC/Portland runners" and both would be true.
If you were to say they're not OTC runners, though, you'd be wrong.