Pompeyo Antonio Davalillo Romero [da-va-LEE-yo] (June 30, 1931 – February 28, 2013) was a Venezuelan professional baseball player and minor league manager. He played in Major League Baseball as a shortstop for the Washington Senators. Nicknamed "Yo-Yo" by his teammates, he was listed at 5' 3", 140 lb. Davalillo batted and threw right-handed.

Davalillo is listed in major league records as having been born in Cabimas, Venezuela. Official Venezuelan baseball resources indicate that he was born on July 5, 1928. A good defensive player, Davalillo was drafted by the New York Yankees in 1953 and later transferred to the Washington Senators. At the age of 25, he made his major league debut with the Senators on August 1, 1953, becoming only the fourth Venezuelan to play in Major League Baseball after Alex Carrasquel (1939), Chucho Ramos (1944) and Chico Carrasquel (1950). He had a promising future, but his aversion to airplane travel, combined with a severe injury, curtailed his career in the major leagues.

Davalillo played eleven seasons in minor league baseball, nine of them at Triple-A level, and posted a .270 average in 1,207 games. He also played in Mexico (1962–64) and spent fourteen seasons with the Leones del Caracas of the Venezuelan Winter League (1952–53 and 1965–66). He is the second-smallest player in major league baseball history. The shortest player on record is 43-inch Eddie Gaedel, who got one plate appearance (a walk) as a 1951 publicity stunt. Five players listed at 5-3 have graced the major leagues since 1900, according to Baseball Reference, with Pompeyo Davalillo, Jess Cortazzo, Bob Emmerich, Stubby Magner and Mike McCormack combining for 90 hits in 463 at-bats".

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