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 the San Diego Street Course. 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 the Coronado Naval Base Chandler Smith will be making his 100th career Truck Series start! Image credit: @Team_FRM X Page

Truck Series Starts

Chandler Smith: 100th start! Ranks 57th

Justin Haley: 66th start ties Brad Keselowski, ranks 108th

Kris Wright: 62nd start ties Christopher Bell, ranks 115th

Andres Perez & Justin Marks: 40th start ties Harrison Burton, ranks 183rd

Corey LaJoie: 25th start! Ties Mark Martin, ranks 273rd

Brenden “Butterbean” Queen: 18th start ties Chase Elliott, ranks 319th

Austin Varco: 1st start!

At San Diego this weekend Jeremy Clements becomes the O’Reilly Series start king as he makes his 548th career O’Reilly Series start. This breaks his tie with Kenny Wallace for most all-time. Image credit: NASCAR Paint Scheme Preview

O’Reilly Auto Parts Series Starts

Jeremy Clements: 548th start! Breaks a tie with Kenny Wallace for 1st all-time

Brennan Poole: 208th start ties Regan Smith, ranks 68th

Austin Hill: 164th start ties Denny Hamlin, ranks 102nd

Parker Retzlaff: 125th start! Ties Kyle Larson, ranks 146th

William Sawalich: 52nd start ties Mike Skinner, ranks 279th

Austin Green: 38th start ties Shane Van Gisbergen, ranks 335th

Lavar Scott: 20th start! Ties Corey Heim & Donnie Allison, ranks 442nd

This weekend Noah Gragson ties racing Legend A.J. Foyt by making his 128th career Cup Series start. Image credit: @Team_FRM X Page

Cup Series Starts

Chase Elliott: 375th start! Ties Ward Burton, ranks 78th

Bubba Wallace: 308th start ties Bobby Isaac, ranks 102nd

Tyler Reddick: 235th start ties David Reutimann, ranks 128th

Christopher Bell: 233rd start ties Rex White, ranks 132nd

Noah Gragson: 128th start ties A.J. Foyt, ranks 206th

Shane Van Gisbergen: 67th start ties Brendan Gaughan, ranks 288th

Connor Zilisch: 20th start! Ranks 521st

Kevin Magnussen: 1st start! The 2,999th driver to make 1+ Cup Series start