Love the article! From your description of park effects, it sounds to me like the Coors Effect is significantly exaggerated. For Rockies players, the inflationary effect of hitting at Coors is at least partially mitigated by the deflationary effect of hitting on the road—ie, the negative impact of going from altitude to sea level. But, if you just take the Rockies (deflated) road scoring at face value, that would pump up the scoring advantage at Coors even further. Instead, some adjustment needs to be made for the Rockies deflated road scoring. As a result of this mistake, Nolan Arenado’s park adjusted metrics (OPS+, wRC+, etc) are much higher in St Louis than Colorado for producing similar results.
Love the article! From your description of park effects, it sounds to me like the Coors Effect is significantly exaggerated. For Rockies players, the inflationary effect of hitting at Coors is at least partially mitigated by the deflationary effect of hitting on the road—ie, the negative impact of going from altitude to sea level. But, if you just take the Rockies (deflated) road scoring at face value, that would pump up the scoring advantage at Coors even further. Instead, some adjustment needs to be made for the Rockies deflated road scoring. As a result of this mistake, Nolan Arenado’s park adjusted metrics (OPS+, wRC+, etc) are much higher in St Louis than Colorado for producing similar results.