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15. Eloy Jimenez, LF, Chicago White Sox

OD Age: 23

2019 WAR: 1.4

At least until they can slot him into a comfy gig as their everyday designated hitter, the Chicago White Sox will have to live with poor defense from Eloy Jimenez. No matter the specific metric, his glove work in left field as a rookie last season was just not good.

Of course, the White Sox won't care much about Jimenez's glove if his bat can do even better than the .828 OPS and 31 homers he posted in 2019. In light of his standout marks in exit velocity and hard-hit rate and his Rookie of the Month-winning surge last September, that can and should happen in 2020.

14. Keston Hiura, 2B, Milwaukee Brewers

OD Age: 23

2019 WAR: 2.1

Keston Hiura didn't put himself on a path to stardom with his defense (see here and here) last season. He also struggled on offense to at least one extent, as he struck out (107) about four times more often than he walked (25) in the 84 games he played in the majors.

But when Hiura does hit the ball, it stays hit. He hit 38 home runs between the minors and majors last season, with average exit velocity and a hard-hit rate that both rated as elite. In fact, not many players did more damage than him when they put the ball in play.

13. Austin Meadows, OF/DH, Tampa Bay Rays

OD Age: 24

2019 WAR: 3.8

Because of the presence of Yoshi Tsutsugo, Austin Meadows probably won't log as much time at designated hitter in 2020. As such, there will be pressure on him to improve his defense after posting below-average metrics (see here and here) in 2019.

Meadows' offense, on the other hand, doesn't need any adjustments. He ended last season with a .922 OPS, 33 home runs and 12 stolen bases, and there's little indication in his Statcast readings that any of it was a fluke. He's low-key one of the best offensive players in the American League.

12. Fernando Tatis Jr., SS, San Diego Padres

OD Age: 21

2019 WAR: 4.2

Had it not been for the injuries that sidelined him for all but 84 games, Fernando Tatis Jr. might have been the National League Rookie of the Year for 2019. He was electrifying on both sides of the ball, but especially on offense where he posted a .317/.379/.590 line with 22 homers and 16 steals.

This leads to the obvious question of why Tatis is outside our top 10. His shaky defense—which was well covered by Ben Clemens at FanGraphs—is one reason. The shocking degree to which he outperformed his hitting peripherals is another. These are ample excuses to not be sold on Tatis' tantalizing talent just yet.

11. Ozzie Albies, 2B, Atlanta Braves

OD Age: 23

2019 WAR: 4.8

Ozzie Albies' three seasons in the majors have taken him from "promising" in 2017 to "good" in 2018 to something more resembling "great" in 2019. He hit .295 with an .852 OPS, 24 homers and 15 steals and trafficked in above-average defense at second base.

Whether Albies can be any better, however, is up for debate. His offensive profile invites some uncertainty, as he's a free-swinger who doesn't light up the exit velocity or hard-hit leaderboards. But even if Albies is what he is, he's still pretty darn good.