Center Dietrich Keller was on the West German basketball team at the 1972 München Olympics. The team lost both the classification match for places 9-12 against Australia by only one point (70-69), and also lost the 11th place match by one point against Spain (84-83). He earned 98 international caps. Domestically, Keller played with USC Mainz (until 1971), TuS 04 Leverkusen (1971-72, West German champion 1972), and USC Heidelberg (1972-77, West German champion 1973 and 1977). Keller started a coaching career at USC Heidelberg after his retirement.