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%+5%+47%+7%+5%-4%-1%
ATL100%-4%-7%-4%+0%+2%+1%
BAL100%+12%-29%-10%+1%-3%+0%
BOS100%-17%-3%+22%+6%-2%-1%
CHC100%+5%-11%-2%+0%+2%+2%
CHW100%+28%-21%-5%+0%+3%+8%
CIN100%+26%-28%-1%-1%+4%+1%
CLE100%-6%-35%+3%-2%+4%+0%
COL100%+11%+34%-1%+16%-14%-2%
DET100%-4%+48%-10%+1%-8%-2%
HOU100%+13%+23%-3%+0%+3%-1%
KC100%-13%+19%+5%+5%-9%-1%
LAA100%-7%-28%-3%-1%+1%-4%
LAD100%+6%-50%-5%-4%+4%-1%
MIA94%-28%+64%+2%+1%-7%-1%
MIL100%+14%-4%+1%-2%+4%+4%
MIN100%-13%+20%+1%+2%-5%-2%
NYM95%+16%-26%-2%-6%+6%+6%
NYY100%+21%-42%-9%+2%+1%+4%
OAK100%-6%+5%+0%-4%-2%+1%
PHI100%+16%-13%0%+1%+2%-3%
PIT100%-19%-18%+5%+1%-9%-6%
SD63%+0%+8%-2%-6%+3%+5%
SEA67%-3%-30%+1%-3%+5%-4%
SF100%-23%+22%+1%-1%-3%-3%
STL100%-15%-12%-3%-1%-5%+1%
TB100%-3%+26%-3%-3%+3%0%
TEX100%+11%+33%-1%+4%-4%+0%
TOR100%+13%+11%+11%+0%+4%-1%
WAS100%-7%-26%+0%+3%-7%-6%

Right-Handed Batters

Team Weight HR 3B 2B Avg SO BB
ARI100%+7%+51%+5%+6%-4%-2%
ATL100%-1%-10%-4%+0%+2%+0%
BAL100%+12%-25%-12%+1%-3%+1%
BOS100%-12%-23%+20%+5%-1%-1%
CHC100%+11%-6%-2%+0%+2%+3%
CHW100%+32%-24%-6%+1%+1%+8%
CIN100%+27%-26%+1%-1%+5%+2%
CLE100%-11%-38%+5%-4%+7%-1%
COL100%+9%+33%+1%+17%-15%-3%
DET100%-5%+50%-9%+1%-7%-2%
HOU100%+13%+25%-3%+0%+3%-1%
KC100%-14%+22%+5%+5%-10%+1%
LAA100%-6%-29%-4%+0%+0%-4%
LAD100%+6%-54%-3%-5%+5%-2%
MIA100%-26%+76%+0%+3%-7%-3%
MIL100%+12%-13%+3%-2%+4%+5%
MIN100%-8%+7%+3%+4%-6%-2%
NYM100%+29%-39%-4%-5%+7%+9%
NYY100%+15%-41%-10%+1%+2%+2%
OAK100%-3%+1%0%-4%-2%-1%
PHI100%+15%-15%+1%+1%+2%-4%
PIT100%-22%-18%+3%+1%-8%-7%
SD85%-9%+17%-3%-10%+3%+9%
SEA77%-5%-30%+4%-6%+7%-5%
SF100%-21%+10%-1%0%-5%-1%
STL100%-17%-9%-1%-2%-5%-1%
TB100%-5%+28%-5%-3%+3%0%
TEX100%+9%+25%+0%+4%-5%+1%
TOR100%+16%+28%+13%+1%+3%+0%
WAS100%-7%-22%-1%+2%-7%-5%

Left-Handed Batters

Team Weight HR 3B 2B Avg SO BB
ARI100%+8%+40%+7%+5%-5%+1%
ATL100%-4%-8%-5%0%+3%+4%
BAL100%+13%-30%-6%0%-2%-1%
BOS100%-25%+22%+27%+7%-5%+1%
CHC100%-4%-16%0%+0%+3%+0%
CHW100%+20%-16%-2%0%+6%+8%
CIN100%+25%-32%-4%-1%+4%-1%
CLE100%-1%-32%+2%-1%+0%+1%
COL100%+14%+29%-5%+13%-14%-2%
DET100%-2%+47%-13%+0%-7%-3%
HOU100%+10%+20%-4%+1%-1%+0%
KC100%-15%+14%+5%+5%-10%-2%
LAA100%-11%-29%-2%-1%+2%-4%
LAD100%+9%-44%-5%-3%+2%-1%
MIA81%-29%+38%+1%+0%-5%-1%
MIL100%+18%+3%-2%+0%+5%+3%
MIN100%-19%+35%-6%+2%-5%-1%
NYM91%+5%-16%+0%-9%+5%+5%
NYY100%+25%-45%-10%+3%-1%+7%
OAK100%-11%+24%-1%-3%-2%+1%
PHI100%+16%-6%-1%+1%0%-1%
PIT100%-9%-26%+7%+2%-10%-3%
SD62%+5%+4%+3%-5%+5%+4%
SEA81%+3%-39%+5%-4%+5%-4%
SF100%-27%+35%+4%-2%+0%-5%
STL100%-12%-14%-7%-1%-5%+3%
TB100%+1%+31%-4%-3%+3%-2%
TEX100%+18%+33%-3%+4%-2%-2%
TOR100%+8%-10%+11%0%+7%-1%
WAS100%-9%-25%+3%+4%-8%-7%