Skip to main content
Lazy loaded image


A graduate of the University of Arizona, Corey Leff—better known as JohnWallStreet—began his career in sports talk radio at the Fox Sports Radio affiliate in Tucson. After a couple of years covering his beloved Wildcats, the New Jersey native left Southern Arizona for sunny South Florida. Leff spent much of the next decade honing his business skills at a pair of tech-based startups. In 2012, he returned to the tri-state area and entered the world of equity research. Leff spent the next half decade at a NYC-based sell-side TMT firm. In 2017, he pulled his sports, business and finance background together with the launch of JohnWallStreet. Leff left Sportico in 2023.

More From JohnWallStreet

More From Our Brands