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 Phoenix 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.

This weekend Austin Hill makes milestone start number 150 in the O’Reilly Auto Parts Series. Photo by Adam Davis — Icon Sportswire via Getty Images
O’Reilly Auto Parts Series Starts
Ryan Sieg: 404th start ties David Green, ranks 10th
Austin Hill: 150th start! Ranks 113th
Josh Bilicki: 131st start ties A.J. Allmendinger, ranks 132nd
Kyle Sieg: 118th start ties Brett Moffitt, ranks 149th
Parker Retzlaff: 111th start ties John Hunter Nemechek, ranks 164th
Chandler Smith & Jesse Love: 70th start ties Ryan Blaney, ranks 232nd
Taylor Gray: 50th start! Ranks 287th
William Byron: 44th start ties Bill Elliott, ranks 304th
Austin Green: 25th start! Ranks 401st
Mason Maggio: 23rd start ties Juan Pablo Montoya, ranks 414th
*Blake Lothian: 1st start!
*Blake Lothian did not qualify for the race and thus will not make his 1st career O’Reilly start

This weekend Ty Dillon makes his 285th career Cup start which tied his grandfather, Richard Childress, for 110th most all-time. Photo by Malcolm Hope — Icon Sportswire via Getty Images
Cup Series Starts
Denny Hamlin: 725th start! Ranks 18th
Michael McDowell: 541st start ties Clint Bowyer, ranks 41st
Chase Elliott: 362nd start ties Neil Bonnett, ranks 83rd
Ty Dillon: 285th start ties Richard Childress, ranks 110th
Ryan Preece: 227th start ties Marcos Ambrose, ranks 134th
Chase Briscoe: 184th start ties Curtis Turner, ranks 163rd