Hi- great piece of family history, but these photos can be tough to research. Based on the fact that your grandfather was born in 1873, and you feel he couldn't have been as old as 37 in the photo, then the image is more likely from about 1905. Very few men sported mustaches in 1910, as can be seen from all the tobacco and candy card issues from that year.
This is clearly a town team and there were likely thousands of them in the first decade of the century. Chances of finding much about them is slim. You are fortunate that the uniforms say Minglewood. I know I haven't offered too much information but like I said it will take some real detective work here.
It's great to have an ancestor who played organized baseball.
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