"Beneath the Underdog" is an ambitious multi-section composition by Branford Marsalis from the 1990 soundtrack album Music from Mo' Better Blues. The title references Charles Mingus's autobiography, connecting this performance to the broader tradition of jazz as intellectual and artistic expression. Set in a 16-bar form in D minor at approximately 186 bpm, the piece features three distinct solo sections. Trumpeter Terence Blanchard opens with five choruses of swinging, harmonically adventurous trumpet over the main theme. Marsalis then shifts to soprano saxophone for a contrasting section that modulates to D-flat minor with a Latin feel, bringing an exotic, searching quality to his improvisation. Pianist Kenny Kirkland closes with four powerful choruses that showcase his ability to combine percussive intensity with harmonic sophistication. The multi-section structure and shifting grooves give the composition a suite-like quality that sets it apart from the more conventional blowing vehicles on the soundtrack. Marsalis's decision to switch from tenor to soprano saxophone mid-performance adds timbral variety and suggests the influence of Wayne Shorter's multi-instrumental approach. The track demonstrates Marsalis's ambition as a composer and bandleader during this formative period of his career.