Barbara Bush
William Howard Taft
William Howard Taft was the first to open the major league baseball season by throwing out the first pitch on April 14, 1910. McKinley threw out the first pitch in a minor league game as governor of Ohio before he was President.
233 pitches
It was 26 pitches
no
60 feet, 6 inches
The first President to throw out a first pitch in Major League Baseball was William Howard Taft in 1910. So none of the earlier Presidents did. Since then, every US President has tossed a pitch in either the All Star Game, the World Series, or the first game of the baseball season.
William Howard Taft was the first President to do the honors when he threw a ball from his seat in the stands to the Washington Senator's opening day pitcher, Walter Johnson, on April 14, 1910.
The first person to throw a pitch in a major league baseball game was Bobby Mathews of the Fort Wayne Kekiongas against the Cleveland Forest Cities on May 4, 1871. The first batter in a major league game, Deacon White, hit a double. I don't know if it was on the first pitch, though.
Prior to his retirement, Kenny Rogers pitched for the Major League Baseball team, the Detroit Tigers. It's still unclear whether Kenny Rogers formally retired from Major League Baseball.
50 50 % chance
No. Johnny Bench never pitched in a Major League Baseball game.