David Fredrick Gerlach[1] (July 2, 1940 – October 22, 2020)[2] was a Canadian curler.

He played as the third on the Ron Northcott rink that won the 1969 Brier and World Championship.

Gerlach was the son of Fritz and Ida Gerlach, and grew up in the Stettler, Alberta area, and graduated high school from the Botha School in Botha, Alberta.

[4] Before becoming a police officer, Gerlach was a farmer in Stettler, Alberta.

[5] He returned to Stettler to farm in the 1970s,[6] and worked as a car salesman.