Although the landscape of the Red Sox infield will be tough to predict, Rafael Devers held his own during his Age-21 season. After being promote, Devers logged 450 at-bats with 59 runs, 21 home runs, 66 RBI, five stolen bases and a .240/.298/.433 slash line. Within his numbers, Devers recorded a .193 isolated power, walked in 7.8 percent of his plate appearances and finished with a 24.7 strikeout percentage.

Devers struggles at times resulting in higher ground ball rates. Last year in Boston, his ground ball percentage of 46.2 percent still resulted in 21 home runs due to a 16.5 home run per fly ball percentage and a 34.4 hard hit rate. In the second half, Devers accrued fewer at-bats, but his home run per fly ball rate spiked in part to his ground ball lean heading above 50 percent. Getting more fly balls should translate to more power for Devers, so noting how he adjusts this spring and in the year ahead will determine his power ceiling for 2019.

When looking at his minor...