Frank Joseph "Cactus" Keck (January 13, 1899 – February 6, 1981) was a pitcher in Major League Baseball. He played for the Cincinnati Reds.
Keck attended Kirkwood High School in Kirkwood, Missouri, where he threw a no-hitter against Maplewood High School. The St. Louis Browns secured exclusive rights to negotiate a contract with Keck upon his graduation from high school.
Keck ended his professional baseball career in 1930 to become a firefighter in Kirkwood. He retired as an assistant fire chief in 1967 and died in 1981.