Theodore "Fats" Navarro was an American jazz trumpet player and a pioneer of the bebop style of jazz improvisation in the 1940s. A native of Key West, Florida, he toured with big bands before achieving fame as a bebop trumpeter in New York. Following a series of studio sessions with leading bebop figures including Tadd Dameron, Bud Powell, and Kenny Clarke, he became ill with tuberculosis and died at the age of 26. Despite the short duration of his career, he had a strong stylistic influence on trumpet players who rose to fame in later decades, including Clifford Brown and Lee Morgan.

Bebop or bop is a style of jazz developed in the early to mid-1940s in the United States. The style features compositions characterized by a fast tempo, complex chord progressions with rapid chord changes and numerous changes of key, instrumental virtuosity, and improvisation based on a combination of harmonic structure, the use of scales and occasional references to the melody.