Walter "Walt" "Reds" William Herrell (February 19, 1889 – January 29, 1949) was an American professional baseball player who played in one game for the Washington Senators during the 1911 season.

Herrell began his career with the Johnson City Soldiers of the Appalachian League in 1911.

He appeared in only one major league game in his career with against the Chicago White Sox in June of that year.

He pitched the last two innings to finish the game and allowed the last four runs of the 18 total scored on five hits.

This biographical article relating to an American baseball pitcher born in the 1880s is a stub.