To include a guy like Mahoney, a 16th round pick, there should be a few sources that suggest the possibility of GNG, though a belief that he falls just short. What you included is one decent but not too long piece from the Deseret News and a Staten Island Advance article on the 2015 SI Yankees, which only includes his name once at the very bottom, not discussing him in any depth. I'd suggest looking for more sources on Mahoney, or waiting until more become available. We don't want every single player with one source added to this page. –