PHOTO (Duke Athletics): D.J. Steward By TOM SHANAHAN Duke’s D.J. Steward grew up with the latest Class of 2020 college basketball 5-star recruits in the era of LeBron James. The 21st century also has become increasingly specialized, with trainers at a young for athletes focused on one sport. But the two – James and specialization – aren’t as closely connected as many 18-year-olds might assume. The King, vying for a place on basketball’s Mt. Rushmore with his fourth…