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Arizona Diamondbacks Game Preview, #136: Park factors

Where have the D-backs had the biggest problems pitching this year? "On a mound" is not what I'm looking for...

Dustin Bradford/Getty Images
Archie Bradley
RHP, 5-8, 4.95
Jon Gray
RHP, 9-6, 4.41
Jean Segura - 2B Raimel Tapia - CF
Chris Owings - SS DJ LeMahieu - 2B
Paul Goldschmidt - 1B Carlos Gonzalez - RF
Jake Lamb - 3B Nolan Arenado - 3B
Yasmany Tomas - RF David Dahl - LF
Brandon Drury - LF Gerardo Parra - 1B
Socrates Brito - CF Daniel Descalso - SS
Tuffy Gosewisch - C Tony Wolters - C
Archie Bradley - RHP Jon Gray - RHP

Coors Field obviously ranks highly, but its ERA of 7.07 for the Diamondbacks this year is only third. Ahead of it, and tied for first place are Fenway and PNC Park in Pittsburgh. Both parks saw the Diamondbacks go 0-3, and allow 24 earned runs in 24 innings of work for an ERA of 9.00. In Boston, it was the home-run that killed us, Arizona giving up nine - nine - over three games. In Pittsburgh, it was just the sheer number of base-runners, the D-backs having a WHIP of 2.125, with 40 hits and 11 walks surrendered. The best park for Arizona is Citizens Bank in Philadelphia, where we conceded only four earned runs over the four games

Of course, small sample size is certainly a factor there. I wouldn't expect Arizona to allow nine runs a game over the longer term against the Pirates. Though, that said, Fenway leads all parks for ERA by National League pitching, at 7.68, with a 2-8 record there, though the other teams to play there included the hapless Braves (though they did at least win a game in Boston, which is more than the D-backs did), as well as the Rockies and Giants. If you expand the sample size a bit, and look just at the National League West ballparks, the order of our ERA is likely close to what you would expect:

  1. Coors Field - 7.07
  2. Chase Field - 5.63
  3. Dodger Stadium - 5.40
  4. Petco Park - 4.36
  5. AT&T Park - 3.19

In franchise history, Coors remains top, unsurprisingly, ahead of BOB/Chase. However, the NL West park with the Diamondbacks lowest ERA is Dodger Stadium at 3.70, edging out AT&T (3.75) and Petco (3.81). Across all parks, past and present, our highest ERA was at old Yankee Stadium (6.24) and the lowest, Angel Stadium in Anaheim (2.02). Finally, random fun fact. The D-backs have balked four times in 77.2 innings pitched in Coors Field this year. Over the 1,135.2 innings pitched everywhere else? Just twice. However, it does seem that it's just the D-backs who have problems here, since everyone else at Coors has just two balks as well, in their 1,036.1 Denver innings.