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 Pocono Raceway. 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.

Jeremy Clements will run this special paint scheme at Pocono this weekend as he makes his 547th career O’Reilly Series start. This ties Kenny Wallace for most all-time in the O’Reilly Series. Image credit: NASCAR Paint Scheme Preview
O’Reilly Auto Parts Series Starts
Jeremy Clements: 547th start ties Kenny Wallace, ranks 1st!
Ryan Sieg: 417th start ties Tommy Houston, ranks 9th!
Jeb Burton: 225th start! Ranks 57th
Garrett Smithley: 216th start ties Kasey Kahne, ranks 61st
Ryan Ellis: 181st start ties Clint Bowyer, ranks 86th
Kyle Sieg: 131st start ties A.J. Allmendinger, ranks 133rd
Blaine Perkins, Harrison Burton & Sammy Smith: 125th start ties Kyle Larson, ranks 143rd
Parker Retzlaff: 124th start ties Terry Labonte, ranks 147th
Leland Honeyman: 62nd start ties Ryan Preece, ranks 252nd
Connor Zilisch: 43rd start ties Adam Petty & Bobby Allison, ranks 312th
Nathan Byrd: 10th start!

At Pocono this weekend Joey Logano will make his 631st career Cup start. This ties Dale Earnhardt Jr. for 31st most all-time. Photo by Jeff Robinson — Icon Sportswire via Getty Images
Cup Series Starts
Joey Logano: 631st start ties Dale Earnhardt Jr., ranks 31st
Austin Dillon: 460th start ties Aric Almirola, ranks 59th
Ross Chastain: 275th start! Ranks 114th
Austin Cindric: 167th start ties Sam Hornish Jr., ranks 167th
Josh Berry: 100th start! Ranks 229th