Below are some potential notable starts being made by drivers this weekend. Notable meaning they will be tied with a driver in number of starts made in that specific series, or the number of starts being made is a significant number that they are reaching in their specific race this weekend at Las Vegas Motor Speedway. Rankings reflect the all-time starts list for that series.
(The image above each series is the driver I find having the most notable start this weekend)

*This will be updated after qualifying for each race if a driver does not make the race.

Sam Mayer makes his 147th career Xfinity Series start this weekend which ties him with 2x Xfinity Series Champion, Dale Earnhardt Jr., for 113th most all-time. Image credit: @HaasFactoryTeam X Page

Xfinity Series Starts

Ryan Sieg: 397th start ties Elliott Sadler, ranks 11th

Trevor Bayne: 165th start ties Ty Dillon, ranks 96th

Ryan Ellis: 161st start ties Ward Burton, ranks 101st

Anthony Alfredo: 148th start ties Brian Vickers, ranks 111th

Sam Mayer: 147th start ties Buckshot Jones & Dale Earnhardt Jr., ranks 113th

Sheldon Creed: 133rd start ties Austin Cindric, ranks 126th

Kyle Sieg: 111th start ties John Hunter Nemechek, ranks 159th

Parker Retzlaff: 104th start ties Martin Truex Jr., ranks 174th

Taylor Gray: 43rd start ties Adam Petty, Bobby Allison & William Byron, ranks 304th

Daniel Dye: 42nd start ties Rusty Wallace & Travis Pastrana, ranks 313th

Christian Eckes: 30th start ties Boris Said & Kurt Busch, ranks 366th

Austin Green: 20th start ties Corey Heim & Donnie Allison, ranks 436th

Denny Hamlin ties NASCAR Legend, Bobby Allison, by making his 718th career Cup Series start this weekend, tying him for 18th most all-time. Photo by Matthew Huang — Icon Sportswire via Getty Images

Cup Series Starts

Denny Hamlin: 718th start ties Bobby Allison, ranks 18th

Ryan Blaney: 375th start ties Ward Burton, ranks 76th

Chris Buescher: 362nd start ties Neil Bonnett, ranks 81st

William Byron: 285th start ties Richard Childress, ranks 109th

Ty Dillon: 278th start ties Ricky Craven, ranks 111th

Ross Chastain: 256th start ties Juan Pablo Montoya, ranks 121st

Cole Custer: 150th start! Ranks 187th