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Rory McIlroy and Jordan Spieth have been regulars in PGA DFS lineups for years, but daily Fantasy golf players will have to decide if they can be trusted when they set their PGA DFS strategy for the 2021 Arnold Palmer Invitational, which tees off on Thursday. McIlroy, who's among the highest priced players on both DraftKings and FanDuel this week, won this event in 2018 and earned a top-five finish in 2020. However, McIlroy enters the 2021 Arnold Palmer Invitational ranked 152nd in driving accuracy percentage (57.21) and 164th in total putting (286.9). 

Spieth, whose PGA DFS price is $9,300 on DraftKings and $10,800 on FanDuel, has finished inside the top-five in two of his last three starts. However, Spieth has never played at Bay Hill, the course that's hosting the 2021 Arnold Palmer Invitational. Can those household names be relied on as PGA DFS picks this week? Or is it time to fade them in favor of players with a significantly lower price tag? Before you enter any PGA DFS tournaments or cash games for the Arnold Palmer Invitational 2021, you'll want to see the top PGA DFS picks and daily Fantasy golf advice from SportsLine's Mike McClure.

McClure is a DFS pro with nearly $2 million in career winnings, and he's been red-hot on his PGA Tour picks this season. McClure is also a predictive data engineer at SportsLine who uses a powerful prediction model that simulates every tournament 10,000 times, taking factors like statistical trends, past results and current form into account. This allows him to find the best PGA DFS values and create optimal lineups that he shares only over at SportsLine. They're a must-see for any PGA DFS player.

Last week at the WGC-Workday Championship, McClure was all over Viktor Hovland at $8,900 on DraftKings and $10,800 on FanDuel. The result: Hovland earned a runner-up finish, returning tournament-winning value at an affordable price. Anybody who had him in their lineups was well on the way to a profitable weekend.   

In addition, McClure's model is up nearly $11,000 on its best bets since the restart, nailing tournament after tournament. This is the same model that has nailed a whopping six majors entering the weekend.

Now, McClure has set his sights on this week's event and revealed his optimal PGA DFS advice, strategy and player pool. Head to SportsLine now to see his top daily Fantasy golf picks for the 2021 Arnold Palmer Invitational.

Top 2021 Arnold Palmer Invitational PGA DFS picks

One of McClure's top PGA DFS picks for the Arnold Palmer Invitational 2021: Will Zalatoris at $8,600 on DraftKings and $10,000 on FanDuel.

Zalatoris is a long ball hitter who averages 308.9 yards per drive this season, which ranks 15th on the PGA Tour. Zalatoris' ability to drive the ball deep into the fairway allows him to use his short irons to approach the green. That lethal combination has helped him hit 69.58 percent of greens in regulation this season. 

Zalatoris is averaging 4.00 birdies per round this season, and he ranks 14th on tour in scoring average (69.969). Lock him in your PGA DFS lineups and look for a big return at the Arnold Palmer Invitational.

McClure's optimal PGA DFS strategy also includes rostering Hovland at $10,600 on DraftKings and $11,900 on FanDuel. 

Hovland ranks inside the top 10 in a number of important statistical categories, which will help him return solid value for your PGA DFS lineups at the 2021 Arnold Palmer Invitational. He ranks 10th in greens in regulation percentage (73.46), ninth in birdie average (4.67) and second in scoring average (69.632). Lock him in your PGA DFS lineup and look for a big return this week at Bay Hill.

How to set your 2021 Arnold Palmer Invitational PGA DFS lineups

McClure is also targeting an undervalued player who's primed to play extremely well this week, giving you a huge return on sites like DraftKings and FanDuel. Picks like these could be the difference between winning your PGA DFS contests or going home with nothing. You can only see who it is here.

So what are the top PGA DFS picks for the 2021 Arnold Palmer Invitational? And which undervalued golfer is a must-roster? Visit SportsLine now to see the complete player pool for FanDuel and DraftKings, all from the expert who's made nearly $2 million in daily Fantasy sports, to find out.