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"
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Please check out my books on baseball history. They include the bio of star second baseman Dots Miller. A book featuring 20 Moonlight Graham players who got into just one game. Another with 13 players who were with the Pittsburgh Pirates during the regular season, but never played a game. There's also one about 27 baseball families, as well as a day-by-day look at the worst team in Pittsburgh Pirates history. All five can be found here:
https://www.amazon.com/stores/John-D...hor/B0DH87Q2DS