MLB Park Factors

We use data back to 2000 with new parks only using data from when they were built or reconfigured.

We apply a weight to each factor based on the number of at bats at the park. The more at bats, the higher the weight, up to 1.00.

HR (% of hits that are HR)  3B (% of hits that are 3B)  2B (% of hits that are 2B)  Avg (% of ABs that are hits)  SO (% of PAs that are strikeouts)  BB (% of PAs that are walks)

All Batters

Team Weight HR 3B 2B Avg SO BB
ARI1.00+5%+51%+7%+5%-4%0%
ATL1.00-4%-8%-5%+0%+2%+1%
BAL1.00+12%-31%-9%+1%-4%+0%
BOS1.00-17%-8%+22%+6%-2%-1%
CHC1.00+6%-9%0%+0%+3%+2%
CHW1.00+28%-24%-5%+0%+2%+8%
CIN1.00+27%-26%-2%0%+3%0%
CLE1.00-4%-36%+3%-2%+3%+1%
COL1.00+12%+33%-1%+15%-14%-1%
DET1.00-5%+44%-8%+2%-8%-2%
HOU1.00+11%+24%-2%+0%+3%-1%
KC1.00-13%+17%+4%+5%-10%0%
LAA1.00-8%-26%-3%0%0%-5%
LAD1.00+7%-48%-5%-4%+5%-2%
MIA0.95-26%+47%+2%+1%-5%+2%
MIL1.00+15%-1%+1%-2%+4%+5%
MIN1.00-15%+18%+1%+1%-4%-1%
NYM0.95+19%-24%-5%-7%+6%+3%
NYY1.00+25%-38%-8%+1%+2%+3%
OAK1.00-4%-3%+0%-4%-2%+1%
PHI1.00+16%-10%-1%+0%+2%0%
PIT1.00-19%-19%+5%+1%-9%-6%
SD0.60+2%+15%-6%-5%+3%+1%
SEA0.640%-33%+0%-2%+4%-4%
SF1.00-23%+33%+1%-1%-2%-3%
STL1.00-16%-11%-3%-2%-4%+1%
TB1.00-4%+22%-2%-3%+2%0%
TEX1.00+9%+28%0%+4%-4%0%
TOR1.00+13%+10%+11%+1%+4%-1%
WAS1.00-8%-21%-1%+3%-6%-6%

Right-Handed Batters

Team Weight HR 3B 2B Avg SO BB
ARI1.00+3%+54%+10%+5%-3%-1%
ATL1.00-5%-5%-4%-1%+2%-1%
BAL1.00+11%-28%-12%+2%-5%+1%
BOS1.00-8%-30%+17%+4%+1%-2%
CHC1.00+10%-5%-1%+0%+2%+3%
CHW1.00+33%-29%-8%+1%-1%+7%
CIN1.00+29%-26%0%+0%+3%+3%
CLE1.00-10%-42%+5%-3%+7%-2%
COL1.00+9%+48%+1%+18%-14%-1%
DET1.00-6%+49%-6%+3%-8%-2%
HOU1.00+14%+28%-3%0%+6%-2%
KC1.00-10%+24%+3%+4%-10%+1%
LAA1.00-5%-29%-5%+0%-2%-4%
LAD1.00+6%-57%-4%-5%+6%-2%
MIA1.00-22%+65%+5%+3%-6%+7%
MIL1.00+14%-7%+3%-2%+4%+6%
MIN1.00-8%-1%+7%+1%-5%-3%
NYM0.98+24%-38%-7%-4%+5%+2%
NYY1.00+17%-29%-6%-1%+3%-2%
OAK1.00+2%-23%+1%-5%-1%+0%
PHI1.00+14%-20%-2%0%+4%-3%
PIT1.00-25%-13%+4%+1%-8%-8%
SD0.60-5%+45%-11%-7%+1%+4%
SEA0.49-4%-17%-4%-1%+4%-4%
SF1.00-18%+20%-2%0%-4%+0%
STL1.00-18%-7%0%-2%-4%+0%
TB1.00-7%+18%-2%-3%+2%+1%
TEX1.00+3%+25%+2%+5%-6%+1%
TOR1.00+15%+35%+11%+1%+3%-1%
WAS1.00-4%-29%-4%+2%-6%-6%

Left-Handed Batters

Team Weight HR 3B 2B Avg SO BB
ARI1.00+0%+47%+9%+5%-4%+1%
ATL1.00-7%-6%-3%0%+4%+1%
BAL1.00+13%-37%-4%+0%-3%-1%
BOS1.00-27%+15%+25%+7%-5%-1%
CHC1.00-5%-15%0%+1%+4%+1%
CHW1.00+21%-19%-1%-2%+5%+8%
CIN1.00+24%-28%-7%+2%+2%-2%
CLE1.00+5%-34%+2%+1%-2%+5%
COL1.00+17%+29%-6%+14%-12%0%
DET1.00-2%+40%-12%+1%-8%-2%
HOU1.00+8%+21%-2%-1%+1%-2%
KC1.00-13%+12%+4%+5%-8%-4%
LAA1.00-11%-21%+1%-2%+2%-5%
LAD1.00+9%-39%-8%-3%+3%0%
MIA0.62-25%+29%0%-2%-4%-1%
MIL1.00+14%+21%-3%+0%+4%+4%
MIN1.00-24%+49%-3%-1%-2%-2%
NYM0.75+9%+1%-1%-7%+5%+1%
NYY1.00+33%-37%-6%+1%0%+7%
OAK1.00-8%+8%+1%-4%-2%+4%
PHI1.00+20%+0%-2%0%+2%0%
PIT1.00-9%-18%+8%+2%-11%-4%
SD0.40+9%0%-4%-1%+5%-2%
SEA0.55+2%-30%+1%0%+2%-4%
SF1.00-27%+59%+9%-3%+4%-7%
STL1.00-11%-21%-7%0%-6%+4%
TB1.00-1%+19%+2%-3%+2%+1%
TEX1.00+14%+42%-3%+4%-1%-2%
TOR1.00+8%-15%+8%-1%+6%-3%
WAS1.00-11%-23%+2%+5%-8%-6%