Left field - Juan Soto, Washington Nationals

While Soto was slightly overshadowed by fellow rookie Ronald Acuna Jr. last season, he did have one of the best rookie seasons in recent memory. It's not like 19-year-olds often have .406 on-base percentages as he did last year. He's only batting .228 to begin 2019, and he is striking out once every 3.54 plate appearances compared to once every 4.99 in 2018.