He began fighting in carnivals and the US Army ultimately defeating Lou Ambers in New York City on May 10, 1940 to become champion.
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On December 19, 1941 Jenkins defended his title against Sammy Angott.
Karl Jenkins | Roy Jenkins | Katherine Jenkins | Henry Jenkins | Lew Wallace | Lew Grade | Lew Ayres | Philip Jenkins | Paul Jenkins | Lynn Jenkins | Billy Jenkins | Woody Jenkins | Lew Tabackin | Lew Irwin | Lew Hoad | Simon Jenkins | Lew Brown | Jack Lew | War of Jenkins' Ear | Thomas Jenkins Semmes | Terry Jenkins | Peter Jenkins | Lew Stone | Lew Pollack | Lew Christensen | Lew Burdette | Leroy Jenkins (jazz musician) | Leroy Jenkins | Jenkins | Graeme Jenkins |
He never challenged for a world title again, but from 1941 to 1946, he fought Sugar Ray Robinson, Lew Jenkins, Jake LaMotta, Beau Jack, Bob Montgomery, Tommy Bell, Billy Arnold and Freddie Archer.