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. Cleveland won the AAFC championship in 1946, repeating in 1947 and 1948. Simonetti was sent to the Baltimore Colts in 1949, but did not play for the team. After leaving football, he became a weighmaster in Ohio. He died of a heart attack in 1973.