Preston, 23, was rushed to a local hospital around 4:14 p.m. but died from his injuries. The other shooting victim is in stable condition.
Preston was believed to be a resident of Kansas City, Missouri. He is KCMO's 49th homicide victim of 2012. Preston had no ties to the YMCA.
Kansas City police are seeking tips. Call the TIPS Hotline at 816-474-8477 or the Homicide Unit at 816-234-5043 if you have info.