Adolph G. "Ade" Sieberts (August 29, 1893 – April 28, 1968)[1] was an American basketball player, most notable for a college career distinguished by his becoming Oregon State University's first All-American in the sport.

He was also named an All-American by the Helms Athletic Foundation for his 1915–16 junior season.

[2] Sieberts quit the Aggies' basketball team during his senior season to enter the business world.

[3] Despite this he was named to the PCC all-conference team for the second consecutive season.

This biographical article relating to a United States basketball player, coach, or other figure born in the 1890s is a stub.