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%+52%+7%+5%-4%+0%
ATL1.00-3%-8%-5%+0%+2%+1%
BAL1.00+12%-31%-9%+1%-4%0%
BOS1.00-18%-8%+23%+6%-2%-1%
CHC1.00+5%-9%0%+0%+3%+2%
CHW1.00+28%-24%-5%+0%+2%+8%
CIN1.00+26%-25%-2%0%+3%0%
CLE1.00-4%-36%+3%-2%+3%+1%
COL1.00+11%+34%-1%+16%-14%-1%
DET1.00-5%+43%-9%+1%-8%-2%
HOU1.00+11%+23%-3%+0%+3%-1%
KC1.00-13%+17%+4%+5%-10%0%
LAA1.00-8%-27%-3%0%0%-4%
LAD1.00+8%-48%-5%-4%+4%-2%
MIA1.00-28%+55%+4%+1%-7%+1%
MIL1.00+15%-2%+1%-2%+4%+5%
MIN1.00-16%+21%+1%+2%-4%-1%
NYM1.00+16%-26%-3%-7%+5%+2%
NYY1.00+26%-38%-8%+1%+2%+3%
OAK1.00-4%-2%+1%-4%-2%+1%
PHI1.00+16%-11%-1%+0%+2%-1%
PIT1.00-19%-19%+5%+1%-9%-6%
SD0.68-2%+11%-5%-6%+4%+2%
SEA0.73+0%-32%0%-3%+5%-5%
SF1.00-22%+32%+1%-1%-2%-3%
STL1.00-15%-11%-3%-2%-4%+1%
TB1.00-4%+23%-3%-3%+2%+0%
TEX1.00+9%+28%-1%+4%-4%0%
TOR1.00+13%+11%+11%+0%+4%-1%
WAS1.00-9%-21%-1%+3%-6%-5%

Right-Handed Batters

Team Weight HR 3B 2B Avg SO BB
ARI1.00+3%+58%+9%+5%-3%-1%
ATL1.00-5%-6%-4%0%+2%-1%
BAL1.00+11%-30%-12%+2%-5%+0%
BOS1.00-8%-30%+18%+5%+1%-2%
CHC1.00+10%-5%-1%+0%+2%+3%
CHW1.00+33%-28%-7%+1%0%+7%
CIN1.00+27%-25%0%+0%+3%+3%
CLE1.00-10%-41%+5%-3%+8%-2%
COL1.00+9%+49%+1%+18%-14%-1%
DET1.00-5%+49%-7%+3%-8%-2%
HOU1.00+14%+29%-3%0%+5%-3%
KC1.00-11%+23%+3%+4%-10%+1%
LAA1.00-5%-29%-5%+0%-2%-4%
LAD1.00+6%-57%-4%-6%+6%-2%
MIA1.00-23%+60%+7%+2%-7%+5%
MIL1.00+14%-8%+2%-2%+3%+7%
MIN1.00-10%+1%+8%+2%-5%-2%
NYM1.00+21%-42%-4%-5%+6%+2%
NYY1.00+19%-30%-6%-1%+3%-2%
OAK1.00+2%-23%+2%-5%-2%+1%
PHI1.00+15%-20%-2%0%+4%-3%
PIT1.00-25%-12%+4%+1%-8%-8%
SD0.67-9%+27%-10%-7%+2%+4%
SEA0.57-4%-16%-6%-2%+5%-5%
SF1.00-19%+19%-1%0%-4%+0%
STL1.00-17%-7%+0%-2%-4%+0%
TB1.00-7%+19%-3%-3%+2%+1%
TEX1.00+3%+25%+1%+5%-6%+1%
TOR1.00+16%+35%+11%+1%+3%-1%
WAS1.00-5%-27%-4%+2%-6%-5%

Left-Handed Batters

Team Weight HR 3B 2B Avg SO BB
ARI1.00+0%+45%+9%+4%-4%+2%
ATL1.00-7%-5%-3%0%+4%+1%
BAL1.00+13%-35%-4%+0%-3%-1%
BOS1.00-27%+16%+25%+7%-5%-1%
CHC1.00-6%-15%0%+2%+4%+1%
CHW1.00+21%-18%-1%-2%+5%+8%
CIN1.00+24%-28%-7%+1%+3%-2%
CLE1.00+4%-35%+2%+1%-2%+5%
COL1.00+16%+31%-7%+14%-13%0%
DET1.00-1%+40%-12%+1%-7%-2%
HOU1.00+8%+19%-3%-1%+1%-2%
KC1.00-13%+12%+4%+5%-8%-4%
LAA1.00-12%-22%+1%-3%+2%-5%
LAD1.00+11%-39%-8%-3%+2%-1%
MIA0.68-26%+42%+2%-3%-4%-1%
MIL1.00+15%+19%-2%+0%+5%+3%
MIN1.00-24%+45%-2%-1%-2%-2%
NYM0.81+7%-5%-1%-8%+4%0%
NYY1.00+33%-38%-6%+1%0%+6%
OAK1.00-8%+9%+1%-4%-2%+4%
PHI1.00+19%+1%-2%0%+2%-1%
PIT1.00-9%-20%+8%+2%-11%-4%
SD0.46+8%+1%-4%-2%+6%-2%
SEA0.61+4%-29%-1%-1%+4%-4%
SF1.00-27%+55%+8%-3%+4%-7%
STL1.00-9%-19%-7%0%-6%+5%
TB1.00-2%+19%+2%-3%+1%+1%
TEX1.00+13%+41%-3%+4%-1%-1%
TOR1.00+7%-14%+9%-1%+7%-3%
WAS1.00-12%-24%+3%+5%-8%-5%