Key notes: The MARS Late Model Championship Series wraps up its 2026 season with this weekend’s Fall Nationals at Lucas Oil Speedway in Wheatland, Mo., starting with Friday’s 30-lap, $5,000-to-win prelim. … The two-day program concludes with Saturday’s 50-lap, $10,000-to-win finale. … Ryan Unzicker of El Paso, Ill., enters Friday with a 36-point advantage over Jason Feger of Bloomington, Ill. … Tony Jackson Jr. of Lebanon, Mo., has three major Lucas Oil Speedway wins since 2022, including last year’s $10,000 Fall Nationals finale. … Chase Junghans of Manhattan, Kan., won September’s $10,000 Ron Jenkins Memorial finale on the Midwest LateModel Racing Association. … Chris Simpson of Oxford, Iowa, has three Wheatland specials since 2024, including that year’s Fall Nationals finale, combining to collect more than $37,000 over that span. … Payton Looney of Republic, Mo., topped 2022’s $7,000 Spring Nationals prelim after an upset win in 2020’s Show-Me 100, worth $20,000. … Super stocks contest the $25,000-to-win 10th annual Big Buck 50 on the undercard. … Gates open at 4 p.m. with hot laps at 6:15, daily. … Watch live on FloRacing.

Who to watch: Tony Jackson Jr. of Lebanon, Mo., seeks his second straight Fall Nationals victory at Wheatland.

Points chase: Before Wheatland Friday: 1. Ryan Unzicker (1,239); 2. Jason Feger (1,203); 3. Dylan Thornton (1,146); 4. Daniel Adam (896); 5. Bob Gardner (893).

Expected entrants: Tony Jackson Jr., Jason Feger, Ryan Unzicker, Billy Moyer, Chris Simpson, Terry Phillips, Gordy Gundaker, Dylan Thornton, Chase Junghans, Dallon Murty, Payton Looney, Aaron Marrant, Kylan Garner, Mason Oberkramer, Scott Crigler, Tyler Wolff, Jeff Herzog, Bob Gardner, Tyler Kuykendall, Cole Wells, Daniel Adam, Jake Little, Jeffrey Ledford, Mark Voigt, Chevy Boyer and others.

Current weather: Clear, 90°F

Next series race: October 10, Lucas Oil Speedway (Wheatland, MO) $10,000