As a Vegas bookmaker, Micah Roberts was the first to offer expanded NASCAR betting. Now he hands out NASCAR winners to his followers, and he's already up huge this season.

Those who have wagered $100 on Roberts' winning pick for each of the 28 NASCAR races in 2019 are already up $2,100! In fact, those who put down $50 on Roberts' top-four leaderboard picks are up $2,050 on the year, buoyed by Alex Bowman's stunning 30-1 win at Chicago and with Denny Hamlin taking down Bristol at 12-1.

Roberts for 2019 off to a blazing start with Jimmie Johnson as a hefty 25-1 long shot at the Advance Auto Parts Clash. The result: Johnson survived a huge crash and went on to win the rain-shortened race as Roberts' followers raked it in. At the TicketGuardian 500, Roberts nailed Kyle Busch at 4-1 over the heavily favored Kevin Harvick, and at Dover he won with Martin Truex Jr. at 8-1. Truex won the race despite starting at the back of the field.

Roberts' top 20 leaderboard has been on top of it, too. At the TicketGuardian 500, he nailed an eye-popping eight of the top 10. At the Auto Club 400, he got nine of the top 10 correct.

Roberts entered the 2019 NASCAR season after finishing big-time in the black in 2018. Those who wagered $100 on each of his picks last year have $1,750 in profit to show for it. His biggest wins came when he went against the grain, taking Brad Keselowski at 12-1 to win the South Point 400 at Las Vegas in the opening race of the NASCAR playoffs and going with Joey Logano, also 12-1, to take the First Data 500 at Martinsville. He also nailed four of Harvick's nine series victories and three of Busch's nine wins. Anyone who's following his picks is up HUGE year after year. 

Now Roberts has analyzed the field for Sunday's Bojangles' Southern 500 at Darlington Raceway. The green flag drops at 6 p.m. ET.

We can tell you that Roberts is fading Kyle Larson, the race favorite at 5-1 Bojangles Southern 500 odds. Larson has led the most laps on this track the last two years but has never won there and Roberts doesn't see it happening this year – he has Larson barely finishing in his top 10.

"He last won a Cup race in 2017 and has never won in any series at Darlington, so how is he the favorite to win this?" Roberts told SportsLine. "Perhaps the main reason is the race package with aero ducts and engines featuring 550 horsepower that he's driven to a top-five finish in his last four races with it. Still, 5-1 odds? No thanks." 

However, Roberts is eying a dark horse with double-digit odds who has run well at this track and has raced strong using the car package in play. He's trending upward and Roberts says Sunday could be his day. Anyone who backs this driver could hit it BIG.

So who wins the Bojangles' Southern 500? And which driver stuns NASCAR? ... Join SportsLine right now to see the full projected leaderboard for the Bojangles' Southern 500, all from the nation's premier NASCAR betting expert who's up HUGE year after year!