He was a catcher and right fielder for Beaumont High School from 1967 to 1971. He received All-League and All-Metro Honors. During that same time, he was a catcher for the Beaumont-Vashon American Legion team. In 1971 and 1972, he played right field for the Forest Park Community College team. In 1972 and 1973, he was a right fielder for Harris-Stowe College. Vasser was a right fielder in the Tandy League from 1971 to 1978. He played for the Saints from 1971 to 1973, the Dodgers from 1974 to 1976, and the Braves in 1977 and 1978. He was team captain and MVP of the Dodgers team that won the Missouri state championship. Vasser began his baseball career in 1960 as a catcher in the Tandy League. He played for the Memorial Bulletts in 1960 and 1961. He was a catcher for the Wrens in 1962, and then again in 1964 and 1965. In 1963, he played for a team managed by Nathan Colbert, Senior, who was a catcher for the Kansas City Monarchs and father of Major League star Nate Colbert. In 1966, Vasser was a catcher for the Spirits in the Khoury League. In 1967, he caught for the Saints in the Lou Brock League. Vasser was an outstanding hitter who loved the game of baseball. He conducted baseball clinics and also provided financial support for amateur teams in the St. Louis area.