Unknown gentlemen

This photograph was found with my grandmother's things. I'm unsure of the identity of the gentlement in this picture, but my best guess is that these are her Robinson uncles. My grandmother's name was Draxie Robinson Causey. Her father's name was Nelson Robinson. Nelson's mother was Polly Jane Robinson and, according to his death certificate, his father's name was Willie Belcher. Polly Jane's parents were Sallie Robinson and Elisha Hopkins.

Who are the young men in this photo?