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Miguel Sano, Twins

One of the league's biggest disappointments of 2018 had to be Sano. In 71 games, he checked in under the Mendoza line at .199. The 25-year-old's struggles sent him down to Triple-A for about a month. He hit 13 homers in the big leagues last year after combining for 53 in 2016-17. If he isn't hitting, Sano isn't exactly known as a Gold Glove-caliber infielder.