All city: New York 1951.

1951 all New York City selections are in bold.  Lefty pitchers are in Italics.  Pyth is Pythagorean W-L (estimate of a team's winning percentage given their runs scored and runs allowed).  Comments below.  Click link to view data for years 1947-1957.  Seeing the players in a matrix may have some surprises.  Batting data below sorted by OPS+ per team.

1951	New York Giants	Brooklyn Dodgers	New York Yankees
C	Wes Westrum	Roy Campanella	Yogi Berra
1B	Whitey Lockman	Gil Hodges	Johnny Mize
2B	Eddie Stanky	Jackie Robinson	Jerry Coleman
SS	Al Dark	Pee Wee Reese	Phil Rizzuto
3B	Bobby Thomson	Billy Cox	Bobby Brown
LF	Monte Irvin	Andy Pafko	Gene Woodling
CF	Willie Mays	Duke Snider	Joe DiMaggio
RF	Don Mueller	Carl Furillo	Hank Bauer
P	Sal Maglie	Preacher Roe	Eddie Lopat
P	Larry Jansen	Don Newcombe	Vic Raschi
P	Dave Koslo	Ralph Branca	Allie Reynolds
P	Jim Hearn	Carl Erskine	Tom Morgan
Man.	Leo Durocher	Chuck Dressen	Casey Stengel
W-L	98-59	97-60	98-56
Pyth	93-64	96-61	96-60
Dif	5	1	2
Rank	2	1	1
WS			won
Attend.	1,059,539	1,282,628	1,950,107
Att rank	2	1	1
1951	New York Giants	Brooklyn Dodgers	New York Yankees

Rk	Pos		Age	G	PA	AB	R	H	2B	3B	HR	RBI	SB	CS	BB	SO	BA	OBP	SLG	OPS	OPS+ ▾	TB	GDP	HBP	SH	SF	IBB
1	UT	Bobby Thomson	27	148	603	518	89	152	27	8	32	101	5	5	73	57	.293	.385	.562	.947	150	291	14	4	7
2	OF	Monte Irvin	32	151	657	558	94	174	19	11	24	121	12	2	89	44	.312	.415	.514	.929	147	287	15	9	1
3	OF	Willie Mays	20	121	523	464	59	127	22	5	20	68	7	4	57	60	.274	.356	.472	.828	120	219	11	2	1
4	C	Wes Westrum	28	124	474	361	59	79	12	0	20	70	1	0	104	93	.219	.400	.418	.818	119	151	10	5	4
5	SS	Al Dark	29	156	700	646	114	196	41	7	14	69	12	7	42	39	.303	.352	.454	.805	114	293	11	6	6
6	2B	Eddie Stanky	35	145	654	515	88	127	17	2	14	43	8	5	127	63	.247	.401	.369	.770	108	190	5	6	5
7	1B	Whitey Lockman*	24	153	673	614	85	173	27	7	12	73	4	5	50	32	.282	.339	.407	.746	99	250	17	3	6
8	3B	Hank Thompson*	25	87	308	264	37	62	8	4	8	33	1	2	43	23	.235	.342	.386	.728	95	102	7	0	1
9	OF	Don Mueller*	24	122	493	469	58	130	10	7	16	69	1	1	19	13	.277	.307	.431	.737	95	202	4	1	4

Rk	Pos		Age	G	PA	AB	R	H	2B	3B	HR	RBI	SB	CS	BB	SO	BA	OBP	SLG	OPS	OPS+ ▾	TB	GDP	HBP	SH	SF	IBB
1	C	Roy Campanella	29	143	562	505	90	164	33	1	33	108	1	2	53	51	.325	.393	.590	.983	159	298	19	4	0
2	2B	Jackie Robinson	32	153	642	548	106	185	33	7	19	88	25	8	79	27	.338	.429	.527	.957	154	289	10	9	6
3	1B	Gil Hodges	27	158	681	582	118	156	25	3	40	103	9	7	93	99	.268	.374	.527	.901	138	307	13	5	1
4	OF	Andy Pafko	30	84	320	277	42	69	11	0	18	58	1	4	35	27	.249	.350	.484	.834	120	134	8	8	0
5	OF	Duke Snider*	24	150	672	606	96	168	26	6	29	101	14	10	62	97	.277	.344	.483	.828	118	293	23	0	4
6	OF	Carl Furillo	29	158	724	667	93	197	32	4	16	91	8	7	43	33	.295	.344	.427	.772	105	285	15	7	7
7	SS	Pee Wee Reese	32	154	711	616	94	176	20	8	10	84	20	14	81	57	.286	.371	.393	.763	104	242	19	2	12
8	3B	Billy Cox	31	142	507	455	62	127	25	4	9	51	5	5	37	30	.279	.336	.411	.747	98	187	8	2	13

Rk	Pos		Age	G	PA	AB	R	H	2B	3B	HR	RBI	SB	CS	BB	SO	BA	OBP	SLG	OPS	OPS+ ▾	TB	GDP	HBP	SH	SF	IBB
1	IF	Gil McDougald	23	131	473	402	72	123	23	4	14	63	14	5	56	54	.306	.396	.488	.884	142	196	12	4	11
2	C	Yogi Berra*	26	141	594	547	92	161	19	4	27	88	5	4	44	20	.294	.350	.492	.842	130	269	16	3	0
3	OF	Gene Woodling*	28	120	485	420	65	118	15	8	15	71	0	4	62	37	.281	.373	.462	.835	129	194	8	0	3
4	OF	Hank Bauer	28	118	394	348	53	103	19	3	10	54	5	2	42	39	.296	.373	.454	.827	127	158	10	1	3
5	OF	Mickey Mantle#	19	96	386	341	61	91	11	5	13	65	8	7	43	74	.267	.349	.443	.792	117	151	3	0	2
6	OF	Joe DiMaggio	36	116	482	415	72	109	22	4	12	71	0	0	61	36	.263	.365	.422	.787	116	175	16	6	0
7	3B	Bobby Brown*	26	103	369	313	44	84	15	2	6	51	1	1	47	18	.268	.369	.387	.756	108	121	4	3	6
8	1B	Johnny Mize*	38	113	373	332	37	86	14	1	10	49	1	0	36	24	.259	.339	.398	.736	102	132	7	4	0
9	SS	Phil Rizzuto	33	144	630	540	87	148	21	6	2	43	18	3	58	27	.274	.350	.346	.696	92	187	10	5	26
10	2B	Jerry Coleman	26	121	404	362	48	90	11	2	3	43	6	1	31	36	.249	.315	.315	.630	73	114	11	4	8

All city manager:
Leo Durocher - cheated
Chuck Dressen - blew a big lead
Casey Stengel - beat the cheater in the Word Series.

Ralph Branca 1953
via wikipedia commons

The Dodgers and Giants finished in a tie and then played three extra regular season games.  Don Newcombe pitched into the 9th inning with a 4-1 lead in the final game and was relieved by Ralph Branca with one out, one run in and runners on second and third.  The batter was Bobby Thomson who had homered off Branca a few days earlier.  Rookie Willie Mays, in a big slump, was on deck.  The Dodgers decided to pitch to Thomson rather than load the bases and pitch to Mays.  Thomson hit a home run to win the pennant.

To his credit Branca never complained after he learned that the Giants had been stealing signs from center field in the Polo Grounds, their home park.  Thomson claimed he could not remember if he got the sign on the homer.  Backup Giant catcher Sal Yvars told me about 12 years ago that the Giants did not try to steal the signs from the Yankees in the World Series because there were too many people watching.  The Yankees won the WS 4-2, their third consecutive.

Campanella and Berra both won their first of three MVP awards in five years.  27 year old Gil Hodges became the first Dodger to hit 40 homers and he was 1951 city home run champ.  Mickey Mantle and Willie Mays were rookies.

Sal Maglie and Larry Jansen won 23 games for the Giants.  For the Dodgers Preacher Roe won 22 and Don Newcombe 20.  Whitey Ford was in the Army but Vic Raschi and Eddie Lopat each won 21 for the Yankees.  Lopat was the only Yankee player to make all city in 1951.