Key notes: The Comp Cams Super Dirt Series, Nutrien Ag Revival Super Dirt Series and Ross Foundation Sooner Late Model Series converge upon Thunderbird Speedway for the fourth annual Hayden Ross Memorial. … The weekend began when Cade Dillard of Robeline, La., led all 20 laps of Friday’s $5,066 prelim for his sixth Comp Cams and fourth Revival Series wins this season. … The two-day program concludes with Saturday’s 30-lap, $10,066-to-win finale. … The event honors Hayden Ross of Muskogee, Okla., who tragically died in October of 2022 at the age of 20 and was posthumously crowned the 2022 Sooner Series champion. Ross won his last race on Sept. 30, 2022, at Thunderbird, the track promoted by his father; Hayden’s former No. 66 Rocket Chassis will be piloted by his younger brother, Eli Ross. … The younger Ross has four career Sooner specials, including last year’s Hayden Ross Memorial, worth nearly $10,000. … Brett Hansen of Fort Gibson, Okla., has four Sooner Series wins at Thunderbird, combining for more than $4,000. … Kip Hughes of Enid, Okla., is also a four-time Sooner winner at Thunderbird, earning $4,000. … Modifieds, B-mods, factory stocks and pure stocks are on the undercard. … Pits open at 3 p.m. and grandstands open at 5:30 with hot laps at 6:30. … Streaming is available on ArrowVision Live.

Who to watch: Cade Dillard of Robeline, La., seeks a sweep of the Hayden Ross Memorial after winning Friday’s opener at Thunderbird.

Points chase: Comp Cams before Thunderbird Saturday: 1. Cade Dillard (2,130); 2. Kyle Beard (1,795); 3. Timothy Culp (1,755); 4. Billy Moyer (1,740); T5. Chandler Petty (1,690); T5. Eli Ross (1,690). Revival before Thunderbird Friday: 1. Chris Bragg (1,620); 2. Eli Ross (1,580); 3. Jerrett Bransom (1,370); 4. Jon Mitchell (1,110); 5. John Briggs (1,020). Sooner before Thunderbird Saturday: 1. Dakota Dellinger (2,610); 2. Ashlee Buck (2,310); 3. James Rini (2,235); 4. Eric Brill (2,210); 5. Dustin Leatherman (1,915).

Expected entrants: Cade Dillard, Billy Moyer, Terry Phillips, Timothy Culp, Eli Ross, Kyle Beard, Morgan Bagley, Clay Stuckey, Scott Crigler, Billy Moyer Jr., Aaron Marrant, Kylan Garner, Kip Hughes, R.C. Whitwell, Tyler Kuykendall, Jake Nightingale, Chris Bragg, Tyler Wolff, Chandler Petty, Drew Armstrong, Ryan Johnson, Brandon Ball, Joe Chalmers, Dakota Dellinger, Geoff Aitken, Jerrett Bransom and others.

Next series race: July 17, Batesville Motor Speedway (Locust Grove, AR) $5,000