14

Greg Allen, Indians

After the first 39 plate appearances of his big-league career in 2017, Allen saw 291 last year. Turning 26 on March 15, he ended up with a .257 average, two home runs, 11 doubles, and 21 steals. He has converted 157-199 (78.9 percent) of his stolen base tries in the minor leagues. With his speed, he should cover a lot of ground in the outfield although he hasn't yet graded all that well on defense.