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 100%.

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
ARI100%+4%+50%+7%+5%-4%-1%
ATL100%-4%-6%-4%0%+3%+1%
BAL100%+12%-30%-10%+1%-3%0%
BOS100%-17%-4%+22%+6%-2%-1%
CHC100%+5%-9%-2%+0%+2%+2%
CHW100%+28%-21%-5%0%+3%+9%
CIN100%+26%-30%-2%0%+4%+1%
CLE100%-6%-34%+4%-2%+4%+1%
COL100%+10%+36%-2%+16%-14%-2%
DET100%-5%+47%-9%+1%-8%-2%
HOU100%+13%+25%-2%+0%+3%-1%
KC100%-14%+20%+5%+5%-9%-2%
LAA100%-6%-28%-3%-1%+2%-4%
LAD100%+7%-51%-4%-4%+4%-2%
MIA100%-28%+53%+2%+0%-6%-1%
MIL100%+16%-5%+0%-2%+4%+5%
MIN100%-10%+10%+1%+3%-5%-3%
NYM100%+23%-29%0%-6%+6%+4%
NYY100%+22%-39%-9%+1%+1%+5%
OAK100%-6%+6%0%-4%-2%+0%
PHI100%+16%-16%+0%+1%+1%-3%
PIT100%-18%-17%+5%+1%-9%-6%
SD77%+5%+1%-6%-6%+5%+4%
SEA85%-5%-31%-3%-3%+7%-5%
SF100%-24%+23%+1%-1%-2%-3%
STL100%-15%-13%-2%-1%-5%+1%
TB100%-3%+24%-4%-3%+3%-1%
TEX100%+10%+33%-1%+4%-4%+1%
TOR100%+13%+10%+11%+0%+4%-1%
WAS100%-8%-24%+0%+3%-7%-6%

Right-Handed Batters

Team Weight HR 3B 2B Avg SO BB
ARI100%+5%+52%+6%+6%-4%-2%
ATL100%-1%-9%-4%+0%+2%+1%
BAL100%+12%-26%-12%+1%-3%+1%
BOS100%-12%-24%+21%+5%-1%-1%
CHC100%+12%-5%-2%0%+2%+2%
CHW100%+32%-25%-6%+0%+1%+9%
CIN100%+27%-27%+1%-1%+5%+2%
CLE100%-10%-36%+5%-3%+7%-1%
COL100%+8%+35%+0%+17%-14%-3%
DET100%-5%+51%-8%+1%-7%-3%
HOU100%+13%+27%-2%+0%+3%-1%
KC100%-14%+22%+5%+4%-10%0%
LAA100%-5%-28%-5%0%+1%-4%
LAD100%+6%-54%-3%-5%+5%-3%
MIA100%-23%+55%0%+2%-7%-3%
MIL100%+14%-12%+3%-2%+4%+5%
MIN100%-5%-3%+2%+5%-6%-3%
NYM100%+28%-34%-3%-5%+7%+6%
NYY100%+14%-36%-10%+0%+3%+3%
OAK100%-3%+1%-1%-4%-2%-1%
PHI100%+16%-18%+1%+1%+1%-5%
PIT100%-21%-17%+3%+1%-8%-7%
SD100%-3%+10%-8%-8%+5%+11%
SEA99%-9%-35%-1%-7%+9%-6%
SF100%-22%+11%-1%0%-5%-1%
STL100%-17%-10%-1%-2%-5%-1%
TB100%-6%+28%-5%-2%+3%0%
TEX100%+8%+25%+0%+4%-5%+2%
TOR100%+16%+24%+12%+1%+2%+0%
WAS100%-9%-21%0%+2%-7%-5%

Left-Handed Batters

Team Weight HR 3B 2B Avg SO BB
ARI100%+8%+44%+6%+5%-5%+0%
ATL100%-5%-8%-4%0%+4%+4%
BAL100%+13%-32%-6%0%-3%-2%
BOS100%-26%+21%+27%+7%-4%+0%
CHC100%-3%-14%-1%+0%+4%+0%
CHW100%+21%-14%-3%-1%+6%+8%
CIN100%+24%-32%-5%0%+4%-1%
CLE100%-1%-32%+2%-1%0%+1%
COL100%+13%+32%-5%+13%-14%-2%
DET100%-4%+44%-12%+0%-7%-2%
HOU100%+12%+19%-2%+1%0%0%
KC100%-16%+17%+6%+5%-9%-2%
LAA100%-10%-29%-2%-1%+3%-4%
LAD100%+9%-45%-5%-3%+2%-1%
MIA94%-35%+41%+2%+0%-3%0%
MIL100%+21%+1%-2%+0%+5%+3%
MIN100%-18%+31%-6%+2%-4%-3%
NYM100%+19%-29%+3%-8%+4%+5%
NYY100%+29%-43%-10%+3%-1%+8%
OAK100%-12%+21%-1%-3%-3%+0%
PHI100%+15%-11%+0%+1%-1%+1%
PIT100%-8%-24%+7%+1%-9%-3%
SD74%+10%-2%+1%-5%+7%+2%
SEA99%+2%-40%+1%-2%+6%-5%
SF100%-29%+36%+4%-3%+0%-5%
STL100%-12%-10%-6%-1%-6%+3%
TB100%+2%+27%-4%-3%+3%-2%
TEX100%+16%+33%-3%+4%-3%-1%
TOR100%+8%-8%+11%-1%+7%-1%
WAS100%-9%-22%+2%+3%-8%-7%