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Marcus Semien, Athletics

While Semien has always been a solid player, 2019 was a real breakout for him. He finished third in AL MVP voting, and made just 12 errors (made an unsightly 35 in 2015). On offense, he posted a bevy of career-bests including batting average (.285), OPS (.892), homers (33), RBIs (92), and runs (123).