Like most pro football players, Keith Stokes would like to one day make it to the National Football League. But he also understands he can't play football forever. "As you get older you have to choose to continue your playing career or do something else," Stokes said. Stokes, who turns 34 on Monday, has been able to do both to this point. Off the field, the Lancaster resident works as a behavior counselor for Phoenix Academy, an alternative school in the School District of Lancaster. On the field, he's served as the defensive coordinator for J.P. McCaskey High School in Lancaster the last four seasons. He's also put together quite a successful 11-year pro career as a wide receiver and kick return specialist, playing in…