Driver Loop Data Stats - Racing-Reference

2025 NASCAR Cup Series Loop Data stats for William Byron

Click on the Race to see results for that race.

Race	Start	Mid Race	Finish	High Pos.	Low Pos.	Avg. Pos.	Pass Diff.	Green Flag Passes	Green Flag Times Passed	Quality Passes	Pct. Quality Passes	Fastest Lap	Top 15 Laps	Pct. Top 15 Laps	Laps Led	Pct. Laps Led	Total Laps	DRIVER RATING
1	5	22	1	1	30	11	-7	503	510	311	61.8	1	149	74.1	10	5.0	201	103.1
2	16	8	27	1	27	8	23	327	304	266	81.3	3	242	92.0	6	2.3	263	91.7
3	15	5	2	1	15	5	6	58	52	38	65.5	4	95	100.0	1	1.1	95	119.9
4	1	3	6	1	20	4	-7	33	40	28	84.8	18	301	96.5	83	26.6	312	121.1
5	8	2	4	1	23	8	32	110	78	90	81.8	18	248	92.9	10	3.7	267	121.9
6	5	2	12	1	32	8	12	131	119	50	38.2	3	220	82.4	1	0.4	267	99.4
7	10	11	22	9	36	18	-15	69	84	15	21.7	5	170	42.5	0	0.0	400	71.6
8	1	1	2	1	12	2	-3	19	22	15	78.9	86	297	100.0	243	81.8	297	142.7
9	26	11	6	4	26	12	13	66	53	27	40.9	15	316	63.2	0	0.0	500	93.1
10	16	19	4	1	31	16	31	679	648	256	37.7	6	72	38.3	10	5.3	188	87.4
11	2	6	13	1	30	10	-14	61	75	34	55.7	11	222	81.9	22	8.1	271	106.4
12	7	30	24	2	35	22	-17	77	94	18	23.4	18	65	24.4	0	0.0	266	88.2
13	3	1	2	1	23	2	4	72	68	44	61.1	70	394	98.5	283	70.8	400	143.4
14	3	3	5	1	32	5	10	113	103	73	64.6	13	294	98.0	1	0.3	300	114.9
15	4	1	28	1	28	3	-6	44	50	33	75.0	24	194	97.0	98	49.0	200	116.7
16	27	14	9	1	36	15	-2	82	84	36	43.9	0	65	65.0	1	1.0	100	86.5
17	31	7	27	2	31	17	36	121	85	38	31.4	0	62	38.8	0	0.0	160	57.0
18	18	35	37	3	32	29	15	78	63	64	82.1	1	56	81.2	0	0.0	69	63.9
19	38	40	40	38	40	40	0	0	0	0	0.0	0	0	0.0	0	0.0	1	25.7
20	3	10	8	2	17	4	-13	51	64	25	49.0	7	109	99.1	0	0.0	110	111.9
21	5	5	31	3	25	6	-5	56	61	26	46.4	8	383	97.5	0	0.0	393	91.7
22	6	18	16	1	25	6	-6	73	79	34	46.6	11	156	92.9	0	0.0	168	110.4
23	2	15	1	1	30	6	-2	63	65	39	61.9	32	313	89.4	141	40.3	350	143.1
24	10	2	4	2	31	8	-1	83	84	26	31.3	2	78	86.7	0	0.0	90	111.9
25	14	22	12	2	38	12	3	196	193	86	43.9	12	323	80.8	0	0.0	400	88.8
26	8	9	19	1	40	17	11	318	307	175	55.0	3	79	49.4	5	3.1	160	71.6
27	11	21	21	8	30	15	1	124	123	39	31.5	1	254	69.2	0	0.0	367	76.2
28	6	13	11	2	29	12	35	88	53	39	44.3	0	178	74.2	0	0.0	240	85.3
29	7	19	12	2	29	13	8	126	118	72	57.1	2	292	58.4	0	0.0	500	87.1
30	5	21	3	5	5	4	1	38	37	27	71.1	10	293	97.3	0	0.0	301	115.2
31	11	22	9	5	31	17	-4	93	97	37	39.8	0	137	50.2	0	0.0	273	72.8
32	13	10	11	5	30	15	15	130	115	45	34.6	0	68	62.4	0	0.0	109	77.2
33	5	3	36	1	17	7	5	78	73	59	75.6	20	230	97.9	55	23.4	235	99.9
34	13	12	25	1	40	16	31	480	449	203	42.3	4	94	48.7	4	2.1	193	76.1
35	1	1	1	1	8	2	1	19	18	18	94.7	99	500	100.0	304	60.8	500	147.7
36	2	3	33	1	33	3	4	15	11	14	93.3	30	309	97.5	52	16.4	317	100.9

Green Flag Passes: Green flag passes for position.

Pass Diff.: Difference between Green Flag Passes and Green Flag Times Passed.

Quality Passes: Number of times passing a car running in the Top 15 while under a green flag.

Fastest Lap: How many times a driver had the fastest lap of all drivers.

Driver Rating: A formula combining the following categories: Win, Finish, Top-15 Finish, Average Running Position while on Lead Lap, Average Speed Under Green, Fastest Lap, Led Most Laps, Lead-Lap Finish. Maximum: 150 points per race.