The photo was taken in 1886 during the Opening Day game between the New York Giants and the Boston Beaneaters (really?).
With one finger Charles “Old Hoss” Radbourn of the Boston Beaneaters (seriously?) earns a place in history as the first known man to flip the bird on camera. Bonus points for managing to photobomb in a time when photographs required almost a full minute of complete stillness not to come out blurry.