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 Watkins Glen International. 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.

This weekend at Watkins Glen Daniel Hemric & Jake Garcia make their 83rd career Truck Series start which ties the late Greg Biffle for 72nd most all-time. Image credit: NASCAR Paint Scheme Preview & James Gilbert — Getty Images
Truck Series Starts
Tanner Gray: 150th start! Ranks 29th
Christian Eckes & Timmy Hill: 124th start ties Kevin Harvick, ranks 39th
Ty Majeski: 122nd start ties Austin Hill, ranks 42nd
Daniel Hemric & Jakes Garcia: 83rd start ties Greg Biffle, ranks 72nd
Kris Wright: 57th start ties Brandon Jones, Jeb Burton & Morgan Shepherd, ranks 129th
Toni Breidinger: 31st start ties David Ragan, Jimmy Spencer & William Byron, ranks 219th
Corey LaJoie: 20th start! Ties Elliott Sadler, ranks 303rd
Cole Butcher: 10th start! Ranks 420th
Dystany Spurlock: 1st start!

At Watkins Glen this weekend Brennan Poole makes his 203rd career O’Reilly Series start which ties former O’Reilly and Cup Series Champion, Bobby Labonte for 74th most all-time. Image credit: @TeamAlphaPrime X Page
O’Reilly Auto Parts Series Starts
Brennan Poole: 203rd start ties Bobby Labonte, ranks 74th
Anthony Alfredo: 164th start ties Denny Hamlin, ranks 164th
Kyle Sieg: 127th start ties Matt DiBenedetto, ranks 140th
Blaine Perkins, Harrison Burton & Sammy Smith: 121st start ties Dave Blaney, ranks 148th
Jesse Love: 79th start ties Erik Jones, ranks 218th
Carson Kvapil: 55th start ties Kyle Petty, ranks 269th
Derek White: 23rd start ties Juan Pablo Montoya, ranks 416th
Matt Wilson: 1st start!

This weekend William Byron will become the 107th driver to make 300 career NASCAR Cup Series starts. Image credit: NASCAR Paint Scheme Preview
Cup Series Starts
Denny Hamlin: 733rd start ties Ryan Newman, ranks 16th
Bubba Wallace: 303rd start ties Dick Trickle, ranks 104th
William Byron: 300th start! Ranks 107th
Tyler Reddick: 230th start ties Joe Weatherly, ranks 133rd
Cody Ware: 154th start ties Fonty Flock, ranks 188th
John Hunter Nemechek: 125th start! Ranks 208th
Shane Van Gisbergen: 62nd start ties Glen Wood, ranks 294th
Riley Herbst: 56th start ties Buckshot Jones, ranks 306th