After an up-and-down first two seasons, Rosario fulfilled his promise as a power hitter last year and became Minnesota's everyday left fielder. He had always been a free swinger, but his success in 2017 was largely fueled by a significantly reduced strikeout rate (25.7 percent in 2016 to 18 percent last season). Rosario may never walk a ton, but he made strides in that department, upping his walk rate from 3.4 percent to 5.9 percent. His 27 home runs may look like an outlier, but his 16.4 percent HR/FB was near the median among everyday outfielders. He used to have decent speed, but was just 9-for-17 on stolen-base attempts, so he may not have the green light as much going forward. While he is trending away from being a contributor in steals, his improvements as a hitter give him a chance to continue being a positive contributor in batting average. His .290 average came with a .312 BABIP, well below his .325 career mark. Better luck in 2018 could negate his expected regression in that department.