Park Factors Question

liam4  4/8/2014 5:07 PM

I was surprised to see the 12% increase in HR at Coors Field, vs. 41% at US Cellular (CHW).  Is this right?  I know the dimensions mean more triples etc. at Coors, and US Cellular is a great hitters park, but seems like a dramatic difference.

Looking at parkfactors.com, which appears to use 2010-2013, it shows Coors at 47% increase in HR, US Cellular at 35%.  I think BBM uses since 2000?

http://www.parkfactors.com/COL

ken_admin  4/8/2014 5:57 PM

We use percent HR of hits rather than pure HR total when showing the factors. In other words, COL may have more HRs total since there are more hits there while CHW has a higher percent of HRs. Does that make sense?

liam4  4/8/2014 7:06 PM

Got it.  So the higher averages translates to more at bats in Colorado, and BBM park factors are on an at bat basis.  Do more at bats get figured into daily batter projections at Coors?

ken_admin  4/8/2014 8:24 PM

Yes, as the projected hitters improve, the overall plate appearances will increase.