Aha! (I think.) It's Angel "Jack" Aragón (son of 1914 Yankee Angel Aragón), who caught for the Giants in 1944:
Aragón spent 1947 in AAA Minneapolis, so perhaps the Giants called him up to New York during the parade of catchers and just didn't get him into a game? (If I could ID the stadium, we could see if it was fairly near to Minny.)
Alternatively, this is a 1944 picture, and Aragón has simply rolled his sleeves up to hide the second stripe we see on Gee's picture, above. But it doesn't seem as though the sleeves are long enough to merit such treatment, and Aragón's sleeves don't look rolled up, IMO.
But I do think it's Aragón.