Judomaster's secret identity was Hadley "Rip" Jagger, a sergeant in World War II in the United States Army. He rescued the daughter of a pacific island chief and in return was taught the martial art of Judo. He had a kid sidekick named Tiger.
Excellent martial artist, specializing in Judo.
- This version of Hadley Jagger (Earth-Four), including all history and corresponding appearances, was initially erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. However the ending of Convergence retroactively prevented that collapse, saving all the alternate realities, though in an "evolved" form. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 18 Appearances of Hadley Jagger (Earth-Four)
- 2 Images featuring Hadley Jagger (Earth-Four)
- Quotations by or about Hadley Jagger (Earth-Four)
- Character Gallery: Hadley Jagger (Earth-Four)