Luka Doncic - Dallas Mavericks

Trae Young isn’t the only high-profile sophomore player who has shown massive improvement from his rookie year. Doncic, last season’s Rookie of the Year, is nearly averaging a triple-double (28.7 points, 10.3 rebounds, 9.3 assists) and is shooting more efficiently including making an absurd 62.2 percent of his two-point tries.