Xfinity Series Recap: 2021 Ag-Pro 300 (Talladega Superspeedway)

Jeb Burton clinched victory in the 90-lap race, despite starting from 9th. Austin Cindric and AJ Allmendinger secured 2nd and 3rd places, respectively. Major incidents and shifts highlighted the competitive nature of the event.

Truck Series Recap: 2021 ToyotaCare 250 (Richmond Raceway)

John Hunter Nemechek clinched victory by leading the final 17 laps, displaying a stellar ARP of 3.50. He outperformed Kyle Busch, who finished second, and Tyler Ankrum, who surged from 30th to 3rd.

New features: preferred reports, glossary, car overviews

Lap Raptor has added some new features. I find them useful! User accounts are useful By signing up for Lap Raptor, you can now set preferences on what your preferred reports are. The two most popular pages are the Drivers stats list and the race pages, so you can now

Cup Series Recap: 2021 Blue-Emu Maximum Pain Relief 500 (Martinsville Speedway)

Martin Truex Jr. won a thrilling 500-lap race with an impressive ARP of 3.88 and a notable GR-LR of 3.74. Despite Denny Hamlin leading 406 laps, late-race cautions led to his third-place finish. Chase Elliott finished second.

Xfinity Series Recap: 2021 Cook Out 250 (Martinsville Speedway)

Josh Berry clinched victory from 29th position with a stellar average running position of 5.93 and a net gain rating of 4.09. His lead from Lap 78 to Lap 250 set the race dynamics, edging out Noah Gragson and Daniel Hemric.

Cup Series Recap: 2021 Folds of Honor QuikTrip 500 (Atlanta Motor Speedway)

Ryan Blaney clinched victory after leading the final 9 laps with an impressive ARP of 2.77. Despite leading 292 laps, Kyle Larson finished 2nd. Alex Bowman showed significant improvement, finishing 3rd.

Xfinity Series Recap: 2021 EchoPark 250 (Atlanta Motor Speedway)

Justin Allgaier clinched victory from 6th with strong metrics and a net gain rating of 2.67. Martin Truex Jr., despite leading 108 laps, finished second. The race featured seven caution flags, reshaping the outcome.

Cup Series Recap: 2021 Instacart 500 (Phoenix Raceway)

Martin Truex Jr. wins after starting fifth, finishing first with an ARP of 5.58. Joey Logano, leading most of the race, finishes second. Denny Hamlin maintains top rankings and finishes third. Brad Keselowski ends fourth.

Feature update: retention tweaks, and a note on average running position

First update: the maximum denominator of the retention score weights is now 20 instead of 10 to better represent the realities of the sport. The top twenty cars are competing for playoff spots. 10 and 20 are equally arbitrary, but 20 has that backing it. The original post has been

Lap Raptor explained: Retention, gain and loss ratings

Lap Raptor offers two types of retention report: cumulative and per 100 laps. Let's address the columns in chunks, discuss what each stat is useful for and how we can develop a better retention metric that may have predicted the 2020 Champion.