Getty Zack Moss tries to break a tackle against the Los Angeles Chargers. N ot for long. The NFL has a lot of nicknames, but among them, Not For Long, is one of the most popular. Some players who enter the NFL enjoy long and successful careers, playing for well over a decade and joining the ranks of NFL legends. But for many others, a career in the NFL is very short– only a few seasons– and results in players walking away when they are still young men. Former Los Angeles Chargers defensive back,