Number 4: Jason Jennings (35 OPS+, 347 plate appearances)
Of all of the players on this list, Jason Jennings had the most plate appearances. That was partially due to his six seasons as a Rockie but also, he started in all of his 156 appearances as a Rockie.
When he won the NL Rookie of the Year Award in 2002, he hit .306/.348/.371 with 11 RBI, four doubles, and even three walks.
Overall, as a Rockie, he hit .219/.259/.285 with two home runs and 25 RBI along with 14 doubles.
Number 3: Brian Bohanon (39 OPS+, 181 plate appearances)
Brian Bohanon spent three seasons as a Rockie and by OPS+, he got better by each season at the plate.
Overall, with the Rockies, he hit .226/.262/.342 with three home runs and 21 RBI along with nine doubles.
His best season was his last in the majors (2001) and he hit .323/.344/.452 in 33 plate appearances. He had four doubles and three RBI.