Juan Francisco Herrera Villavicencio (June 16, 1934 – April 28, 2005), nicknamed "Pancho" and "Frank", was a Cuban-born professional baseball player.

A prodigious minor-league slugger, Herrera was listed at 6 feet 3 inches (1.91 m) tall and 220 pounds (100 kg); he threw and batted right-handed.

[2] Born in Santiago de las Vegas,[1] near Havana, Herrera began his organized baseball career in the higher levels of the Phillies' farm system in 1955.

He started 15 late-season games at third base, and got untracked at the plate in a five-game stretch from September 13–17, going 12 for 19, raising his average from .053 to .342,[4] and hitting his first major-league home run off left-hander Bill Henry of the Chicago Cubs on the 16th at Connie Mack Stadium.

Although he started 1961 as the Phillies' regular first baseman, his production seriously declined: his OPS dropped to .759 on 32 extra-base hits (including 13 home runs) and his batting average dipped 23 points to .258.

He had another strong season for Buffalo in 1962, making the All-Star team and leading the International League in home runs (32) and tying for the RBI title (108).

At season's end, the Phillies used him and outfielder Ted Savage in a trade with the Pittsburgh Pirates for veteran third baseman Don Hoak.