Johnnie Lee LeMaster (born June 19, 1954) is an American former Major League Baseball infielder.

On September 2, 1975, LeMaster became the third player in major league history to hit an inside-the-park home run in his first at bat, during a 7–3 win over the Dodgers.

LeMaster is remembered for a game in July 1979, when he took the field wearing the phrase on his back that Giants fans often welcomed him with; in place of his last name was the word "BOO".

[2] After retirement, in 1988, he played one season with the Senior Professional Baseball Association, on the Fort Myers Sun Sox.

[4] From 2016 through his 2019 resignation,[5] LeMaster coached baseball at Paul G. Blazer High School in Ashland, Kentucky.