Jeffrey N. Leonard is a former left fielder

Left fielder

In baseball, a left fielder is an outfielder who plays defense in left field. Left field is the area of the outfield to the left of a person standing at home plate and facing towards the pitcher's mound...

 in Major League Baseball

Major League Baseball

Major League Baseball is the highest level of professional baseball in the United States and Canada, consisting of teams that play in the National League and the American League...

 with a 14-year career from to . He played for the Los Angeles Dodgers

Los Angeles Dodgers

The Los Angeles Dodgers are a professional baseball team based in Los Angeles, California. The Dodgers are members of Major League Baseball's National League West Division. Established in 1883, the team originated in Brooklyn, New York, where it was known by a number of nicknames before becoming...

, Houston Astros

Houston Astros

The Houston Astros are a Major League Baseball team located in Houston, Texas. They are a member of the National League Central division. The Astros are expected to join the American League West division in 2013. Since , they have played their home games at Minute Maid Park, known as Enron Field...

 and San Francisco Giants

San Francisco Giants

The San Francisco Giants are a Major League Baseball team based in San Francisco, California, playing in the National League West Division....

, all of the National League

National League

The National League of Professional Baseball Clubs, known simply as the National League , is the older of two leagues constituting Major League Baseball, and the world's oldest extant professional team sports league. Founded on February 2, 1876, to replace the National Association of Professional...

, and the Milwaukee Brewers

Milwaukee Brewers

The Milwaukee Brewers are a professional baseball team based in Milwaukee, Wisconsin, currently playing in the Central Division of Major League Baseball's National League...

 and Seattle Mariners

Seattle Mariners

The Seattle Mariners are a professional baseball team based in Seattle, Washington. Enfranchised in , the Mariners are a member of the Western Division of Major League Baseball's American League. Safeco Field has been the Mariners' home ballpark since July...

, both of the American League

American League

The American League of Professional Baseball Clubs, or simply the American League , is one of two leagues that make up Major League Baseball in the United States and Canada. It developed from the Western League, a minor league based in the Great Lakes states, which eventually aspired to major...

.

Nicknamed "HacMan" after the popular video game PacMan, Leonard was known for his "one flap down" routine: running around the bases after hitting a home run

Home run

In baseball, a home run is scored when the ball is hit in such a way that the batter is able to reach home safely in one play without any errors being committed by the defensive team in the process...

 with one arm hanging motionless at his side.
Leonard was a standout in football, basketball and baseball at Overbrook High School in Philadelphia, which produced basketball stars Wilt Chamberlain

Wilt Chamberlain

Wilton Norman "Wilt" Chamberlain was an American professional NBA basketball player for the Philadelphia/San Francisco Warriors, the Philadelphia 76ers and the Los Angeles Lakers; he also played for the Harlem Globetrotters prior to playing in the NBA...

 and Walt Hazzard

Walt Hazzard

Walter "Walt" Raphael Hazzard Jr. , also known as Mahdi Abdul-Rahman, was an American college, Olympic, and professional basketball player and college basketball coach...

.