Rayl attended Indiana University from 1959 to 1963, where he was an All-American his junior and senior seasons. Rayl averaged 20.6 ppg for his career and still holds the Indiana [Hoosiers men's basketball|IU Hoosiers] single-game scoring record of 56 points, which he did twice against Michigan State and Minnesota. He shot 41.6 percent from the floor and 83.5 percent from the line in 68 games as a Hoosier.
His grandson, Jace, is a guard for the Purdue [Boilermakers men's basketball|Purdue Boilermakers]. Rayl died at his home in Kokomo on January 20, 2019, at age 77.