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 Michigan International 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.

This weekend at Michigan Cole Custer will be making his 164th career Xfinity Series start which tied him with Denny Hamlin and Trevor Bayne for 93rd most all-time. Image credit: @StewartHaasRcng Twitter/X Page
Xfinity Series Starts
Brandon Jones: 290th start ties Mike Harmon, ranks 29th
Josh Williams: 207th start ties Reed Sorenson, ranks 65th
Cole Custer: 164th start ties Denny Hamlin & Trevor Bayne, ranks 93rd
Parker Kligerman: 110th start ties Aric Almirola & Ricky Stenhouse Jr., ranks 153rd
Blaine Perkins: 64th start ties Ty Gibbs, ranks 240th
Chandler Smith: 57th start ties Ernie Irvan, ranks 255th
Lawless Alan & Morgen Baird: 1st start!

Alex Bowman will tie NASCAR great Ernie Irvan and NASCAR Legend Junior Johnson by making his 313th career Cup start this weekend at Michigan. Image credit: @TeamHendrick
Cup Series Starts
Denny Hamlin: 674th start ties Joe Nemechek, ranks 26th
Michael McDowell: 489th start ties Casey Mears, ranks 49th
Austin Dillon: 396th start ties Robby Gordon, ranks 71st
Alex Bowman: 313th start ties Ernie Irvan & Junior Johnson, ranks 95th
Daniel Suarez: 275th start!
Ryan Preece: 175th start!
Ty Gibbs: 75th start!