John Greenig

Civil War soldier at 16, major league baseball pitcher at age 40.

John A. Greenig played one game, starting pitcher for the Washington Senators on May 9, 1888.

Of that Senators team, a baseball writer for The Washington Post said: "a pitcher and catcher and Mr. Hoy constitute the Washington Baseball Club. The other six men who accompany them are put in the field for the purpose of making errors."

In that May 9 game, Greenig faced the Chicago White Stockings, in Chicago. “The Chicago batters pounded his curve balls and scored nine runs in the first two innings. Greenig settled down after that and pitched a complete game, but after the 13-2 loss he was released.”

Twenty-four years before that May 1888 baseball game, “John A. Greenig… enlisted in the Indiana 132nd Infantry, Company K…”

Sixteen-year-old soldier, 40-year old major league baseball player. Obviously, a determined man.

https://sabr.org/bioproj/person/ec3201f6

Greenig statistics: http://www.baseball-almanac.com/players/player.php?p=greenjo01