Listed at 6 feet (1.8 m) tall and 180 pounds (82 kg), Moeller batted and threw left-handed.

At start of his MLB career, Moeller was nicknamed The Kid by the Orioles players both for his boyish looks and making his big-league debut at age seventeen.

In a four-season career, Moeller posted a 6–9 record with a 5.78 ERA in 52 appearances, including 22 starts, 104 strikeouts, and 100 walks in 152⅔ innings of work.

He also pitched in the minor leagues from 1956 through 1963, compiling a 37–38 record with a 3,30 ERA in 118 games, 94 as a starter.

This biographical article relating to an American baseball pitcher born in the 1930s is a stub.