One of the top prospects the Marlins received from the Brewers in exchange for Christian Yelich last winter, Harrison took a step backward in his first year with Miami following his breakout campaign in 2017. The 23-year-old hit just .240/.316/.399 across 136 games in his first taste of Double-A, striking out a whopping 215 times (36%). Harrison reworked his swing during spring training, which could have contributed to some of his struggles, and it's worth noting that he looked more comfortable against fellow prospects in the Arizona Fall League. The outfielder possesses an impressive power/speed combo, as evidenced by his 19 homers and 28 stolen bases at Double-A in 2018, though there's still skepticism surrounding his ability to make enough contact against big-league pitching for those skills to shine through. Harrison could get a look with the big club at some point in 2019, depending on how he adjusts to upper-level pitching.