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Webb Simpson has been excellent at Sea Island, and Scottie Scheffler is off to a scorching-hot start, and they will be among the contenders when the 2021 RSM Classic tees off Thursday. The event in St. Simons Island, Ga., is the last PGA Tour event of the nine-tournament fall segment, and six of the 10 champions at Sea Island Golf Club have been first-time winners. The event almost always goes to the wire, with six of the 11 tournaments since its 2010 debut going to a playoff. That includes the past three, and Robert Streb beat Kevin Kisner on the second extra hole last season to win his second RSM Classic. He has not won another event, and the same is true for four other previous winners. 

Simpson has lost twice in playoffs at Sea Island, and Scheffler has finished fourth and T-2 in his past two events this season. That's why they are the 14-1 co-favorites in the latest 2021 RSM Classic golf odds from Caesars Sportsbook. Cameron Smith is not far behind at 16-1, while Louis Oosthuizen (22-1), Corey Conners (25-1) and Harris English (25-1) also are among the favorites in the 2021 RSM Classic field. Before you lock in any 2021 RSM Classic bets or make any PGA Tour predictions, you need to see what proven golf insider Sal Johnson has to say.

The esteemed golf insider has been around the game for many years and knows what it takes to win. Johnson has been on a strong run during the fall season. 

Before the Mayakoba event in Mexico, Johnson had Viktor Hovland among his players to watch, while he predicted Koepka would miss the cut.

"We still don't know if he is healthy and ready to go," Johnson told SportsLine of Koepka. "He tried to play last year and missed the cut. I have a funny feeling that we will see the same this week."

The 31-year-old didn't break par and went home early again, while Hovland shot 23-under to cruise to a four-stroke victory.

Johnson has been on a strong run already this season. Before the Zozo Championship in Japan, Johnson tabbed Hideki Matsuyama in his best bets, and he was right on the money. Matsuyama shot a final-round 65 and won by five strokes after trailing by one with eight holes to play on Sunday.

At the Sanderson Farms Championship, Johnson nailed Burns as his winner. Anyone who has followed Johnson's advice has cashed in huge.  

Now Johnson, the first producer of "Inside the PGA Tour," a longtime ABC Sports golf producer who worked with Jack Nicklaus and Arnold Palmer, and founder of the world's top golf stats database, has released his highly confident 2021 RSM Classic picks, and they will surprise you. You can only see Johnson's expert PGA Tour golf picks at SportsLine.

Top 2021 RSM Classic golf predictions

Shockingly, the expert is slightly fading Oosthuizen, who is among the favorites at Caesars and the highest-ranked player in the field at No. 9. The South African has played the RSM Classic only twice, missing the cut last year but finishing in fourth place way back in 2011. He had eight top-10 finishes (including four as a runner-up) last season, but his stats are wildly different this year. Johnson isn't sure what to make of that, and he doesn't pick him among his likely winners. 

On the other hand, Johnson knows Scheffler can play well in any conditions and expects him to get a win soon. The 25-year-old is 40 under par over his past three events. He will need to put four great rounds together to win, and he shot 70 or higher in four of those 12 rounds. But he had a second-round 62 in Houston and finished T-2, a week after finishing fourth in Mexico. He tied for fifth at the 2020 RSM Classic and goes into this year's sixth in scoring average (69.723).      

Johnson also is aware of how well Smith finished last season and has started this campaign. He was in the top 15 in four of his final five tournaments of the 2020-21 campaign and in both of his events this season. He finished as runner-up at the Northern Trust in August, shooting a round of 60 in the process. Last week in Houston, he had a second-round 62 and tied for second. The 28-year-old Australian is sixth in scoring average (69.485) and 18th in strokes gained putting. 

How to make 2021 RSM Classic golf picks

For this week's event in Georgia, the golf expert is backing a long shot to contend for the win who comes in at more than 30-1. This veteran has a solid history on St. Simons Island, and he is hitting a ton of fairways and greens this season. He could pull off a stunning result at Sea Island, and anyone who backs this underdog could cash in huge. You can only see this 2021 RSM Classic pick and the rest of Johnson's PGA Tour golf betting advice at SportsLine.

Who wins the 2021 RSM Classic at Sea Island? Where do Scottie Scheffler and Cameron Smith finish? And which massive long-shot is a must-back? Check out the odds below, then visit SportsLine to see Sal Johnson's full leaderboard, picks and analysis for the 2021 RSM Classic, all from the red-hot insider who knows what it takes to win on the PGA Tour.

2021 RSM Classic odds, field, top contenders

Scottie Scheffler 11-1
Webb Simpson 12-1
Cameron Smith 16-1
Louis Oosthuizen 22-1
Corey Conners 25-1
Harris English 25-1
Russell Henley 28-1
Joaquin Niemann 33-1
Adam Scott 35-1
Talor Gooch 40-1
Kevin Kisner 40-1
Alex Noren 40-1
Mito Pereira 50-1
Keegan Bradley 55-1
Justin Rose 55-1
Mackenzie Hughes 60-1
Brendon Todd 60-1
Brian Harman 66-1
Matt Wallace 66-1
Max Homa 66-1
Seamus Power 66-1
Joel Dahmen 66-1
Kevin Streelman 66-1
Jhonattan Vegas 66-1
Danny Lee 66-1
Chris Kirk 66-1
Robert Streb 70-1
Charles Howell 70-1
Matt Kuchar 70-1
Lanto Griffin 80-1
Hayden Buckley 80-1
Denny McCarthy 80-1
Emiliano Grillo 80-1
Patrick Rodgers 80-1
Luke List 80-1
Alex Smalley 80-1
Jason Day 80-1
Branden Grace 80-1
Troy Merritt 80-1
Aaron Rai 90-1
Adam Long 90-1
Sebastian Munoz 90-1
Taylor Moore 100-1
Matthias Schwab 100-1
Henrik Norlander 100-1
Chad Ramey 100-1
Keith Mitchell 100-1
Chez Reavie 100-1
Lucas Glover 100-1
Harry Higgs 100-1
Tom Hoge 100-1
Adam Hadwin 100-1
Adam Schenk 100-1
Cameron Young 125-1
Cameron Davis 125-1
Scott Piercy 125-1
Hudson Swafford 125-1
Brian Stuard 125-1
Stewart Cink 125-1
Tyler Duncan 125-1
Zach Johnson 125-1
Dylan Frittelli 125-1
Stephan Jaeger 125-1
Taylor Pendrith 125-1
Brendan Steele 125-1
Sahith Theegala 125-1
Rory Sabbatini 125-1
Patton Kizzire 125-1
Kyle Stanley 125-1
J.J. Spaun 125-1
Matt Jones 125-1
Russell Knox 125-1
Camilo Villegas 125-1
Doug Ghim 125-1
Kevin Tway 150-1
Scott Stallings 150-1
Davis Riley 150-1
John Huh 150-1
Matthew NeSmith 150-1
Michael Thompson 150-1
Andrew Putnam 150-1
Andrew Landry 150-1
Greyson Sigg 150-1
Vincent Whaley 150-1
Lee Hodges 150-1
Hank Lebioda 150-1
Wyndham Clark 150-1
Brice Garnett 150-1
Kramer Hickok 150-1
Kiradech Aphibarnrat 150-1
Bronson Burgoon 150-1
Sepp Straka 175-1
Nick Hardy 200-1
Andrew Novak 200-1
Justin Lower 200-1
Davis Thompson 200-1
Graeme McDowell 200-1
Roger Sloan 200-1
Anirban Lahiri 200-1
Adam Svensson 200-1
Austin Cook 200-1
Kelly Kraft 200-1
J.T. Poston 200-1
David Lipsky 200-1
Ludvig Aberg 200-1
Brandt Snedeker 200-1
Peter Uihlein 200-1
Vaughn Taylor 200-1