It's important for a boxer to be the right weight. So much planning goes into it, from diet to exercise to sauna time. Unfortunately for this fella, a big bulge can tend to throw off scales, even digital ones. Coach trying to telekinetically will the penis down does not help matters.
Unless this guy can get his penis under control, he may end up in a higher weight class with a big bruiser who will pound him silly. Perhaps some sports hypnosis can help, though that can also tend to expand the problem at hand. Soothing and demanding male voices tend to do that.
By the way, is there a job at a boxing gym called Thong Shiner? I think that could be a solid career move for many, on par with Towel Boy and Bulge Photographer.