In 1911, the St. Louis Browns gave a player named Otto Blake a tryout in training camp in the spring. He played with Lancaster in 1910. He did not make the club, instead being sent to Mansfield for 1911. No player named Blake appears with either club in those seasons in Baseball-Reference, but there is a C.O. Blake with Zanesville in 1911 and 1912.
In 1913, Charles "Dutch" Sapp appears playing for Terre Haute and Steubensville before signing on with the Pittsburgh club in the Federal League (that season a minor league). In researching Dutch Sapp, I found the entry for his grave on FindAGrave (
https://www.findagrave.com/memorial/...es-sumner-sapp). There is a brief memory from a relative, noting that when he was a young man playing professional baseball, he played under the name of Otto Blake, so his mother would not know.
Below is a photo of Charles Sapp from his FindAGrave website, compared to a photo of Otto Blake published in the St. Louis Star on March 2, 1911. Charles Sapp, meet Otto Blake.