Erin Kerkhoff, Jamie Nebel and Justice Udelhofen, Potosi/Cassville softball, girls basketball and volleyball head coaches POTOSI — The impact of high school coaches on impressionable teenage athletes can often times go unnoticed or overlooked, but that certainly isn’t the case for three coaches at Potosi High School. Whether it’s their love for sports, their allegiance to their alma mater, or their desire to lead, the coaching carousel at Potosi High School has done a complete 360 with the hiring of three former athletes who were once Chieftains themselves.