Before setting your NASCAR DFS lineups on DraftKings for Saturday's 2019 NASCAR All-Star Race at Charlotte Motor Speedway, you'll want to see what NASCAR insider Matthew Mayer has to say. Mayer is a NASCAR writer for CBS Sports who regularly interviews the biggest names in the sport. He goes straight to the source to get a feel for who to back and who to fade each week.

His approach has led to some HUGE results in NASCAR DFS this year. In addition to cashing on SportsLine last week at Kansas, he was all over Martin Truex Jr.'s win at Dover and stacked his DFS lineup around him for a big cash. He also called Jimmie Johnson's win at The Clash and finished in the top five percent of lineups for the Daytona 500, in addition to winning big on his NASCAR at Texas DFS lineups and calling Kyle Busch's win at Phoenix.

Now he's turned his attention to Saturday night's NASCAR All-Star Race and locked in his optimal DraftKings lineup.

One driver Mayer is high on in the All-Star Race: Kevin Harvick at $9,800 on DraftKings. "It's outrageous how much DraftKings continues to undervalue Kevin Harvick," Mayer said. "If it wasn't for a mere panic attack over a false alarm last week at Kansas, he would have ran away with that race. You'd best believe Harvick hasn't forgotten about that and is motivated to take home the 1-million dollar purse."

Mayer is also targeting an overlooked driver who has a strong track record at Charlotte. He's in prime position to make a run at the checkered flag and comes at a price that won't break the bank. This pick could be the difference between cashing HUGE in your tournaments and cash games or going home with nothing.

So what is the optimal NASCAR DFS tournament lineup for the 2019 All-Star Race? And which value driver is a must-roster? ... Join SportsLine right now to see NASCAR insider Matthew Mayer's complete optimal tournament lineups for DraftKings, and cash big on NASCAR at Charlotte!