Jackpot. September 14,1905 Pirates play an exhibition game against the Springfield Senators. Batting third for the Pirates that day, playing left field was "Koch". The newspaper covering the game says:
"Koch, a recruit coming from nobody-knows-where, played left field for Pittsburgh yesterday"
So I followed that lead and found this on September 19
"It is rumored that "Koch" who has been tried by Pittsburgh is really Dutch Meier, an old Princeton player"