Walter Jennings Slagle (December 15, 1878 – June 14, 1974) was a pitcher in Major League Baseball.

[1] His only major league game was attended by the President William Howard Taft, although Taft didn't stay for the entire game.

Walt was 31 years old when he got to the big leagues, and pitched one inning.

His career likely ended because he contracted the Spanish Flu in 1918 but he did survive.

This biographical article relating to an American baseball pitcher born in the 1870s is a stub.