Bats/Throws: Batting Average (BA)

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For seasons 1903-2012 in the American League and National League.

Definitions:
Both: switch hitters
RR: bats right, throws right
RL: bats right, throws left
LR: bats left, throws right
LL: bats left, throws left
BR: bats both, throws right
BL: bats both, throws left

For recent seasons:

Year	RR	RL	LR	LL	BR	BL
2000	0.2686	0.2478	0.2715	0.2761	0.2705	0.2915
2001	0.2595	0.2185	0.2718	0.2678	0.2686	0.2912
2002	0.2579	0.2042	0.2662	0.2684	0.2628	0.2620
2003	0.2619	0.2327	0.2693	0.2668	0.2653	0.2710
2004	0.2644	0.1932	0.2702	0.2704	0.2643	0.3008
2005	0.2625	0.2384	0.2655	0.2692	0.2676	0.2512
2006	0.2682	0.2000	0.2724	0.2707	0.2716	0.2781
2007	0.2674	0.2274	0.2683	0.2682	0.2717	0.2683
2008	0.2606	0.2600	0.2656	0.2633	0.2749	0.2571
2009	0.2595	0.2490	0.2645	0.2655	0.2679	0.2593
2010	0.2574	0.2403	0.2569	0.2598	0.2561	0.2539
2011	0.2532	0.2186	0.2541	0.2600	0.2581	0.2758
2012	0.2555	0.2298	0.2521	0.2550	0.2544	0.2644

For seasons 1903-2012:
                   RR    RL    LR     LL    BR    BL
Min         0.232 0.092 0.244 0.240 0.209 0.078
Max        0.289 0.287 0.308 0.319 0.290 0.321
Ave         0.257 0.208 0.273 0.271 0.260 0.224

Min, Max, Ave are for all seasons shown in the graph: 1903-2012.  See previous post for percentages of at bats (AB) + Bases on Balls (BB), essentially plate appearances (PA) for each of the six categories.  RL and BL have the fewest PA; they also have the lowest BA: .208 and .224 respectively.  The strictly lefty batters have the highest BA.  Maybe because they stand closer to the bases and because over 70% of pitches are thrown by righties.  For 2012 the BA is about even for RR, LR, LL.