Chris Redman has the most passing yards in a game against Illinois, with 450 yards on September 18, 1999.

Interpreted as:

most passing yards by a player in a game against illinois

	NAME	YDS	DATE	TM		OPP	CMP	ATT	PCT	AVG	TD	INT	RTG	TD%	INT%	SCK	SCKY
1	Chris Redman C. Redman	450	9/18/1999	LOU	vs	ILL	39	60	65.0	7.5	0	2	121.3	0.0	3.3
2	Trevor Siemian T. Siemian	414	11/30/2013	NW	@	ILL	31	44	70.5	9.4	4	0	179.5	9.1	0.0	1	7
3	Blake Barnett B. Barnett	411	9/15/2018	USF	@	ILL	23	40	57.5	10.3	2	2	150.3	5.0	5.0	1	7
4	Scott Rislov S. Rislov	408	9/21/2002	SJSU	@	ILL	27	45	60.0	9.1	1	0	143.5	2.2	0.0
5	Brennan Armstrong B. Armstrong	405	9/11/2021	UVA	vs	ILL	27	36	75.0	11.3	5	1	209.8	13.9	2.8	0	0
6	Tony Pike T. Pike	399	11/27/2009	CIN	vs	ILL	32	46	69.6	8.7	6	0	185.5	13.0	0.0
7	Tyler Donovan T. Donovan	392	10/6/2007	WIS	@	ILL	27	49	55.1	8.0	2	2	127.6	4.1	4.1
8	David Blough D. Blough	377	10/13/2018	PUR	@	ILL	25	36	69.4	10.5	3	1	179.4	8.3	2.8	2	16
9	Aidan O'Connell A. O'Connell	371	10/31/2020	PUR	@	ILL	29	35	82.9	10.6	2	0	190.8	5.7	0.0	4	30
10	Brett Basanez B. Basanez	368	11/23/2002	NW	vs	ILL	31	49	63.3	7.5	1	3	120.8	2.0	6.1
11	Kyle Orton K. Orton	366	9/25/2004	PUR	@	ILL	35	50	70.0	7.3	4	0	157.9	8.0	0.0
12	Jayden Maiava J. Maiava	364	9/27/2025	USC	@	ILL	30	43	69.8	8.5	2	1	151.6	4.7	2.3	1	10
13	Chase Daniel C. Daniel	359	9/1/2007	MIZ	vs	ILL	37	54	68.5	6.6	3	0	142.7	5.6	0.0
14	Taulia Tagovailoa T. Tagovailoa	350	9/17/2021	MD	@	ILL	32	43	74.4	8.1	1	0	150.5	2.3	0.0	3	18
15	Keith Price K. Price	342	9/14/2013	WASH	@	ILL	28	35	80.0	9.8	2	0	180.9	5.7	0.0	2	11
16	Ryan Hart R. Hart	342	9/3/2005	RUTG	@	ILL	27	44	61.4	7.8	2	0	141.7	4.5	0.0
17	Tyler Jones T. Jones	336	9/20/2014	TXST	@	ILL	29	43	67.4	7.8	4	1	159.1	9.3	2.3	4	28
18	Darian Mensah D. Mensah	334	9/6/2025	DUKE	vs	ILL	23	34	67.6	9.8	2	1	163.7	5.9	2.9	2	7
19	Ben Chappell B. Chappell	333	10/17/2009	IND	vs	ILL	23	38	60.5	8.8	3	0	160.2	7.9	0.0
20	Connor Bazelak C. Bazelak	330	9/2/2022	IND	vs	ILL	28	52	53.8	6.3	1	1	109.7	1.9	1.9	1	14
21	Brent Stockstill B. Stockstill	330	9/26/2015	MTSU	@	ILL	29	42	69.0	7.9	3	0	158.6	7.1	0.0	3	37
22	Adrian Martinez A. Martinez	328	9/21/2019	NEB	@	ILL	22	34	64.7	9.6	3	0	174.9	8.8	0.0	2	3
23	Chase Daniel C. Daniel	323	8/30/2008	MIZ	vs	ILL	26	45	57.8	7.2	3	1	135.6	6.7	2.2
24	Blaine Gabbert B. Gabbert	319	9/5/2009	MIZ	vs	ILL	25	33	75.8	9.7	3	0	187.0	9.1	0.0
25	Jeff Smoker J. Smoker	317	10/11/2003	MSU	@	ILL	23	31	74.2	10.2	2	0	181.4	6.5	0.0