A right-handed first baseman, Relling played for the Sotolar Pointers for every year of their existence from 1980 to 1996. He was on six state championship teams with the Pointers who represented Missouri at the NBC tournament in Wichita, Kansas. In 1987, he hit .421 at the NBC Tournament. In 1983, he led the Pointers with 69 hits and a .393 batting average. In 1982, he received the CYC Most Valuable Player Award while playing for the Pointers. In 1979, he received the CYC Most Valuable Player Award while playing for St. Catherine’s Parish. From 1975 to 1979, Relling played first base for Missouri Baptist College, helping his team win the 1978 NLCAA championship. He played for the Fenton Vets in 1977 and 1978. Relling was an assistant baseball coach at St. George Parish from 1997 to 2000.