Pincus Leff's illustrious career in vaudeville began in the 1920s, marked by a significant milestone in January 1925, when he was recruited by the renowned Betty Felsen to join the esteemed Boderick & Felsen vaudeville dancing act.
As a featured tap dancer in the act, Pincus Leff's exceptional talents garnered widespread recognition, frequently being highlighted in advertisements, notices, and reviews. His impressive performances were a staple of the act throughout 1925, as it embarked on a headlining tour across the B.F. Keith vaudeville circuit, traversing the Mid-West and East regions.
In the early months of 1926, Pincus Leff's time with the Boderick & Felsen act came to a close, as he opted to focus on his burgeoning career as Pinky Lee, taking center stage in both theatrical productions and film and television projects.