Also, this list is mostly made up of players in the dying days of their careers. "Now here's where it gets fun: This a table of Free Agents that the Rockies signed after these players had lengthy careers with other teams. Playing at Coors should improve their wRC+ cuz Coors, right? Well, take a look:"
Morneau, Giambi, Reynolds, Cuddy all entered Colorado in the dying days of their careers and each saw immediate resurgences
OPS below of each player the year before joining Colorado and the first yr in Colorado
Morneau-
.741 and .681 in prior years. .860 first year OPS with Colorado
Giambi-
.697 OPS prior year. .776 and ,958 next two short seasons ( he was only averaging 180 PAs at this point in his career cause he was near his 40s)
Reynolds- .681 and .731 before. .806 and ,839 with Colorado.
Cuddyer- .753 and ,805 before. .806 and .919 with Colorado.
Some of these are not huge changes, but all of these occur at later points in players careers when their numbers should be getting worse. Showing the stats of a player in their prime and then saying their numbers got worse in their mid to late 30s with Colorado is ridiculous.