Bats/Throws: percentages 1903-2012.

Clink link to view data and graphs.  Abbreviations are for Bats/Throws.  Plate appearances (PA) are simplified as at bats (AB) plus bases on balls (BB).  Data for switch hitters not included.  Data is from the Lahman database.

Hank Aaron 1960.
See page for author [Public domain],
via Wikimedia Commons

RR: Bats Right/ Throws Right example: Hank Aaron
RL: Bats Right/ Throws Left example: Ricky Henderson

RR RL
min 96.91% 0.34%
max 99.66% 3.09%
ave 98.59% 1.41%

Recent seasons RR RL:
2000 98.61% 1.39%
2001 99.02% 0.98%
2002 99.24% 0.76%
2003 99.38% 0.62%
2004 99.22% 0.78%
2005 98.69% 1.31%
2006 98.87% 1.13%
2007 99.14% 0.86%
2008 98.71% 1.29%
2009 98.60% 1.40%
2010 98.70% 1.30%
2011 98.64% 1.36%
2012 98.44% 1.56%

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LL: Bats Left/ Throws Left example: Babe Ruth
LR: Bats Left/ Throws Right example: Ty Cobb

LL LR
min 31.02% 43.11%
max 56.89% 68.98%
ave 42.44% 57.56%

Recent seasons: LL LR
2000 50.04% 49.96%
2001 48.33% 51.67%
2002 45.84% 54.16%
2003 47.04% 52.96%
2004 47.42% 52.58%
2005 46.85% 53.15%
2006 45.49% 54.51%
2007 43.93% 56.07%
2008 40.89% 59.11%
2009 44.93% 55.07%
2010 48.81% 51.19%
2011 46.39% 53.61%
2012 43.58% 56.42%