Follow seven NBA superstars from their unique beginnings all the way to the top. German Uber-Man Dirk Nowitzki is the Mavericks star player, but he didn't even pick up a basketball until he was 13 years old. Dwight Howard was an unknown who made it straight to the top as first draft pick! Amare Stoudemire didn't even pick up a basketball until he was 14 years old, but he quickly made up for los…