Maybe Derek Jeter isn't as good as we think or what happens to all those lefty throwers?

In 2012 about 16.9% of plate appearances (PA) were by left handed throwers.  See post:

Monday, February 18, 2013
Batters throwing

It doesn't matter how they bat.  They are precluded from playing half of the 8 every day fielding positions.

Derek Jeter and those who play shortstop, second base, third base and catcher do not need to be concerned about southpaw (lefty) non-pitchers (non designated hitters, too).  Jeter only needs to be better than players who throw right handed.  Lefty non-pitchers are confined to first base (1B) and the outfield (OF).

Since about 17% of all PA are by southpaws and since they can only play 50% of the 8 every day fielding positions, then about 34% of the PA for 1B and OF are by southpaws and no PA at SS, 2B, 3B, C are by lefty throwers.

Two lessons:

1. Young right handed players should learn to play SS, 2B, 3B, C because there's much less competition.

2. Teams should avoid southpaw batters as their use is limited.

Players with at least 70% of games at a position and at least 5,000 PA and OPS+ >= 110:

SS:

Rk	Player	OPS+	PA	From	To	Age	G	AB	R	H	2B	3B	HR	RBI	BB	IBB	SO	HBP	SH	SF	GDP	SB	CS	BA	OBP	SLG	OPS	Pos	Tm
1	Honus Wagner	153	9640	1901	1917	27-43	2298	8507	1414	2766	506	210	78	1375	836		648	99	198			601	26	.325	.392	.462	.853	*63/957481	PIT
2	Arky Vaughan	136	7722	1932	1948	20-36	1817	6622	1173	2103	356	128	96	926	937		276	46	116		70	118		.318	.406	.453	.859	*65/74	PIT-BRO
3	Nomar Garciaparra	124	6116	1996	2009	22-35	1434	5586	927	1747	370	52	229	936	403	54	554	59	5	63	129	95	31	.313	.361	.521	.882	*63/5D4	BOS-TOT-CHC-LAD-OAK
4	Lou Boudreau	120	7024	1938	1952	20-34	1646	6029	861	1779	385	66	68	789	796		309	34	164		155	51	50	.295	.380	.415	.795	*6/5342	CLE-BOS
5	Vern Stephens	119	7241	1941	1955	20-34	1720	6497	1001	1859	307	42	247	1174	692	0	685	6	37	8	169	25	22	.286	.355	.460	.815	*65/79	SLB-BOS-TOT-BAL
6	Joe Cronin	119	8840	1926	1945	19-38	2124	7579	1233	2285	515	118	170	1424	1059		700	34	166		57	87	71	.301	.390	.468	.857	*6/5347	PIT-WSH-BOS
7	Derek Jeter	117	11895	1995	2012	21-38	2585	10551	1868	3304	524	65	255	1254	1039	38	1743	163	89	53	269	348	95	.313	.382	.448	.829	*6/D	NYY
8	Barry Larkin	116	9057	1986	2004	22-40	2180	7937	1329	2340	441	76	198	960	939	66	817	55	59	67	178	379	77	.295	.371	.444	.815	*6/4D	CIN
9	Jim Fregosi	113	7403	1961	1978	19-36	1902	6523	844	1726	264	78	151	706	715	48	1097	32	79	53	125	76	40	.265	.338	.398	.736	*635/D74	LAA-CAL-NYM-TOT-TEX-PIT
10	Luke Appling	113	10254	1930	1950	23-43	2422	8856	1319	2749	440	102	45	1116	1302		528	11	74		129	179	108	.310	.399	.398	.798	*6/543	CHW
11	Cal Ripken	112	12883	1981	2001	20-40	3001	11551	1647	3184	603	44	431	1695	1129	107	1305	66	10	127	350	36	39	.276	.340	.447	.788	*65/D	BAL
12	Alan Trammell	110	9376	1977	1996	19-38	2293	8288	1231	2365	412	55	185	1003	850	48	874	37	124	76	156	236	109	.285	.352	.415	.767	*6/D5478	DET

Provided by Baseball-Reference.com: View Play Index Tool Used
Generated 2/25/2013.

Arky Vaughan is the only player who batted either both or lefty; OPS+ 136.  Obviously, they all threw righty.  Jeter is #7 with OPS+ 117.  How would that do at the positions at which lefty throwers are concentrated?

1B:
72 players led by Lou Gehrig: OPS+179.  Gehrig batted and threw lefty.
33 throw lefty: 46%.  (31 of the 33 also bat lefty)

OF:
184 players led by Babe Ruth: OPS+ 206.  Ruth batted and threw lefty.
39 throw lefty: 21%