Jim Tracy installed Dexter Fowler as the Rockies everyday lead-off man. Fowler's stats indicate he should thrive in the slot, as his strength lies in selectivity, not power. His career OBP stands about 100 points higher than his batting average, indicating his ability to draw a walk. Evidence exists that he can get even better at skill.
Pitchers work Fowler outside, whether he bats left or right-handed. While Dexter is selective, he has yet to win the outside corners:
Right now, pitchers get the benefit of the doubt on the edge of the strike zone, most likely because Dexter tries to get calls inside the zone. As he enters his prime years, a little more selectivity at the plate might gain him a few more calls on the edges, and a few more times on base for the big guns behind him.