Joseph Douglas Moeller Jr. (born February 15, 1943) is a former pitcher in Major League Baseball who played for the Los Angeles Dodgers from 1962 to 1971.

Moeller was born in Blue Island, Illinois to Joseph Douglas Sr. and Lois (née Reymeyer), the second of three children.

In 1951, the family moved to Manhattan Beach, California where he attended Mira Costa High School and became known for baseball and basketball.

As an All-Conference pitcher, he complied 0.44 earned run average and attracted attention from a half-dozen major league scouts.

His son Gary played baseball at Cal State Fullerton and achieved professional success in Sweden and New Zealand.