which qb had the highest interception per throw rate

John McCarthy has the most career intercepted passes / passer rating by a quarterback, with 4.27.

Interpreted as:

Which qb had the highest passing interception per throw rate?

	NAME	INT/RTG	INT	RTG	GP	CMP	ATT	PCT	YDS	AVG	YDS/G	TD	TD%	INT%	SCK	SCKY
1	John McCarthy J. McCarthy	4.27	13	3.0	7	20	67	29.9	250	3.7	35.7	0	0.0	19.4
2	George Blanda G. Blanda	4.08	248	60.8	180	1,750	3,653	47.9	24,622	6.7	136.8	208	5.7	6.8
3	John Hadl J. Hadl	3.98	268	67.4	224	2,363	4,687	50.4	33,503	7.1	149.6	244	5.2	5.7	179	1,514
4	Norm Snead N. Snead	3.92	257	65.5	178	2,276	4,353	52.3	30,797	7.1	173.0	196	4.5	5.9	94	744
5	Brett Favre B. Favre	3.91	336	86.0	302	6,300	10,169	62.0	71,838	7.1	237.9	508	5.0	3.3	525	3,487
6	Bobby Layne B. Layne	3.83	243	63.4	175	1,814	3,700	49.0	26,768	7.2	153.0	196	5.3	6.6
7	Jim Hart J. Hart	3.71	247	66.6	201	2,593	5,076	51.1	34,665	6.8	172.5	209	4.1	4.9	243	1,936
8	Vinny Testaverde V. Testaverde	3.56	267	75.0	233	3,787	6,701	56.5	46,233	6.9	198.4	275	4.1	4.0	417	2,992
9	Babe Parilli B. Parilli	3.4	203	59.8	177	1,475	3,153	46.8	21,265	6.7	120.1	165	5.2	6.4	0	0
10	Tobin Rote T. Rote	3.36	191	56.8	149	1,329	2,907	45.7	18,850	6.5	126.5	148	5.1	6.6
11	Joe Namath J. Namath	3.36	220	65.5	140	1,886	3,762	50.1	27,663	7.4	197.6	173	4.6	5.8	109	1,052
12	Fran Tarkenton F. Tarkenton	3.31	266	80.4	246	3,686	6,467	57.0	47,003	7.3	191.1	342	5.3	4.1	274	2,337
13	Johnny Unitas J. Unitas	3.24	253	78.2	211	2,830	5,186	54.6	40,239	7.8	190.7	290	5.6	4.9	74	590
14	Jack Kemp J. Kemp	3.19	183	57.3	122	1,436	3,073	46.7	21,218	6.9	173.9	114	3.7	6.0	21	187
15	John Brodie J. Brodie	3.1	224	72.3	201	2,469	4,491	55.0	31,548	7.0	157.0	214	4.8	5.0	47	380
16	Joe Ferguson J. Ferguson	3.05	209	68.4	186	2,369	4,519	52.4	29,817	6.6	160.3	196	4.3	4.6	312	2,710
17	Stan Heath S. Heath	3.04	14	4.6	12	26	106	24.5	355	3.3	29.6	1	0.9	13.2
18	Dan Fouts D. Fouts	3.02	242	80.2	181	3,297	5,604	58.8	43,040	7.7	237.8	254	4.5	4.3	319	2,304
19	Y.A. Tittle	3	221	73.6	178	2,118	3,817	55.5	28,339	7.4	159.2	212	5.6	5.8
20	Steve Grogan S. Grogan	2.99	208	69.6	149	1,879	3,593	52.3	26,886	7.5	180.4	182	5.1	5.8	247	1,986
21	Terry Bradshaw T. Bradshaw	2.96	210	70.9	168	2,025	3,901	51.9	27,989	7.2	166.6	212	5.4	5.4	307	2,694
22	Ken Stabler K. Stabler	2.95	222	75.3	184	2,270	3,793	59.8	27,938	7.4	151.8	194	5.1	5.9	281	2,514
23	Jim Plunkett J. Plunkett	2.94	198	67.5	157	1,943	3,701	52.5	25,882	7.0	164.9	164	4.4	5.3	380	3,279
24	Dan Marino D. Marino	2.92	252	86.4	242	4,967	8,358	59.4	61,361	7.3	253.6	420	5.0	3.0	270	1,930
25	Eli Manning E. Manning	2.9	244	84.1	236	4,895	8,119	60.3	57,023	7.0	241.6	366	4.5	3.0	411	2,870

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StatMuse has season-level data for intercepted passes and passer rating going back to the 1932 season.

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TEAM	W	L	PCT
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Sun 1/4	ARI	@	LAR	4:25 PM

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Final

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QB Rating Leaders

112.9

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Stafford

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Sack Leaders

22.0

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NFL 2025 Rankings

PPG Rankings

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28.9

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Opp PPG Rankings

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Total Yards Rankings

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Rush Yards Rankings

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Pass Yards Rankings

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Fantasy RB Rankings

312.4

Taylor

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Fantasy WR Rankings

232.5

Smith-Njigba

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NFL 2025 Standings

AFC East	W	L	T	PCT
Patriots - y	13	3	0	.813
Bills - w	11	5	0	.688
Dolphins - e	7	9	0	.438
Jets - e	3	13	0	.188
AFC North	W	L	T	PCT
Steelers	9	7	0	.563
Ravens	8	8	0	.500
Bengals - e	6	10	0	.375
Browns - e	4	12	0	.250
AFC South	W	L	T	PCT
Jaguars - x	12	4	0	.750
Texans - x	11	5	0	.688
Colts - e	8	8	0	.500
Titans - e	3	13	0	.188
AFC West	W	L	T	PCT
Broncos - y	13	3	0	.813
Chargers - w	11	5	0	.688
Chiefs - e	6	10	0	.375
Raiders - e	2	14	0	.125

NFC East	W	L	T	PCT
Eagles - y	11	5	0	.688
Cowboys - e	7	8	1	.469
Commanders - e	4	12	0	.250
Giants - e	3	13	0	.188
NFC North	W	L	T	PCT
Bears - y	11	5	0	.688
Packers - w	9	6	1	.594
Vikings - e	8	8	0	.500
Lions - e	8	8	0	.500
NFC South	W	L	T	PCT
Panthers	8	8	0	.500
Buccaneers	7	9	0	.438
Falcons - e	7	9	0	.438
Saints - e	6	10	0	.375
NFC West	W	L	T	PCT
Seahawks - x	13	3	0	.813
49ers - x	12	4	0	.750
Rams - w	11	5	0	.688
Cardinals - e	3	13	0	.188