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Juan Soto, Nationals

Soto had one of the best season ever by a teenager during his rookie year of 2018, as he just turned 20 on October 25. He played 116 games and batted .292, walked 79 times, and had a .923 OPS. Soto also clubbed 22 home runs and 25 doubles. He was called up after just 122 career games in the minors where he batted .362. The defense could use some work for the 2018 National League Rookie of the Year runner-up, but that is somewhat expected for someone who was playing as a teenager.