The middle-distance star has been setting PRs and winning big since joining a team. As they jogged 15 minutes up a dirt road in Sedona, Arizona, Katie Mackey and her Brooks Beasts teammates chatted about how their track workout at the local high school might unfold at 4,500 feet above sea level. The Seattle-based middle-distance group of 14 athletes, including Angela Bizzarri and Nick Symmonds, spent much of March and April sharing a house in nearby Flagstaff, where they hope