Leonard Patrick "Meatball" Simonetti (November 20, 1919 – August 14, 1973) was an American football tackle who played three seasons in the All-America Football Conference (AAFC) between 1946 and 1948 for the Cleveland Browns. Simonetti was a standout as a fullback at his Ohio high school before switching to tackle while at the University of Tennessee in the late 1930s and early 1940s. After a stint in the U.S. Army during World War II, Simonetti signed with the Browns.