A south suburban youth football team is mourning the loss of a former player who was fatally shot Thursday night in Auburn Gresham. The 14-year-old boy, who hasn’t been formally identified, was shot multiple times around 11:30 p.m. in the 8000 block of South Carpenter Street, Chicago police said. He was treated on scene by paramedics and was taken to University of Chicago Medical Center, where he died. The boy was an alumnus of the Midwest Hawks…