Stacking is an integral part of daily fantasy baseball. Correlation drives upside, giving your lineups a slate-winning ceiling when your stacks explode.

This piece will do the digging and the dirty work each day to determine which stacks are worth rostering on FanDuel's main slate. While we want upside, we also need to factor in game theory, especially in a sport as random as baseball.

The MLB DFS heat map at numberFire is a quick way to get a feel for the overall slate and which offenses are in a good spot. You can also check out our daily fantasy baseball projections -- which are powered by numberFire -- to identify the slate's best bats.

Let's look at the top stacks for today's main slate.

MLB DFS Stacks

Minnesota Twins

Implied Total: 4.63 | Opposing Pitcher: Aaron Civale

The return of Royce Lewis ($4,300) from the injured has seemingly reignited the Minnesota Twins' fire, turning a stagnant offense into one of the most fearsome units in the league in recent weeks. Over the last 14 days, only two other teams have recorded more runs than Minnesota's 74 while only one other team can claim a higher wRC+ than the Twins' 143 mark.

They have a good shot of keeping things rolling today against Aaron Civale and the Tampa Bay Rays. Civale has not played his best ball since linking up with the Rays last year and is now leading the American League in home runs allowed (14) while throwing to a 5.20 ERA. He's still striking batters out at a solid 23.5% clip but might struggle to do so against a Twins team that is striking out at the fourth-lowest rate in the league over the last month.

That means the Twins could really pile on some runs tonight if Civale can't strike them out, making them a great option to stack for today's slate. Lewis is projected for a solid 10.6 FanDuel points in this one -- per our numbers -- but is averaging 17.4 FanDuel points per game on the year and has homered in just about every other game he's played. He's rocking a not-so-casual 1.398 OPS on the season.

Lewis hasn't been the only hot Twins hitter lately -- Carlos Correa ($3,600) is on fire right now, too, ranking ninth in wRC+ over the last two weeks with 4 home runs and 15 RBI in that span. In his only career game against Civale, the veteran shortstop went 1-for-3 with a double and no strikeouts.

Byron Buxton ($2,900) has struggled for most of the year but has had similar past success against Civale. He's squared off against the righty for 14 total plate appearances in his career, tallying 2 homers and a .692 SLG against Civale to date. He's been turning things around lately, too, meaning he could be a strong value play at his sub-$3,000 salary.

Behind that trio, the Twins offer some other solid plays. Ryan Jeffers ($2,900), Willi Castro ($3,100), Carlos Santana ($2,900) and Trevor Larnach ($2,900) are all projected for double-digit FanDuel points, with Larnach sitting as the 12th-best value play on the slate by our projections.

Milwaukee Brewers

Implied Total: 4.50 | Opposing Pitcher: Griffin Canning

The Milwaukee Brewers have a chance to tee off on the Los Angeles Angels today with Griffin Canning on the mound. While the Angels have gotten some solid play out of some their starters, Canning has not been among them. And their bullpen -- which ranks third-worst in Wins Above Average, according to Baseball-Reference -- has allowed opposing hitters to put up FanDuel points later in games.

Canning is giving up an 8.2% barrel rate this year, a bottom-50 mark among qualified arms. The right-hander has the third-worst skill-interactive ERA (4.95) in the Majors backing up his 4.76 ERA and is striking batters out just 15.3% of the time. Considering that the Brewers rank fifth-best in baseball in wRC+ against righties on the year, this one could spiral out of control in a hurry.

Christian Yelich has a team-high $3,900 salary but is projected for the fifth-most FanDuel points of any player on the slate (16.0). He's been superb this year and has an .896 OPS over the last week.

Behind him, the Brewers have some of the best value plays on the slate. Rhys Hoskins ($2,800), Brice Turang ($3,000) and Willy Adames ($3,300) rank as the 7th-, 11th-, and 15th-best point-per-dollar values on the slate, respectively, according to numberFire's model, and are each projected for at least 12.5 FanDuel points. William Contreras is also projected for a solid day with 12.9 FanDuel points but is dealing with a head injury and seems likelier than not to miss the game.

Each of Blake Perkins ($2,900), Joey Ortiz ($2,900), and Jackson Chourio ($2,600) are projected for 9.4 FanDuel points. Ortiz actually leads the Brewers in wRC+ against right-handers this year with a 154 mark while Perkins' 104 wRC+ ranks seventh-best on the squad. Chourio has struggled to find his footing in the Majors but has power-speed upside.

The Brewers offer an appealing combination of both ceiling and value for today's slate, making them a fantastic option for stacks in your DFS lineups today.

Colorado Rockies (and Los Angeles Dodgers)

Implied Total: 4.94 | Opposing Pitcher: Walker Buehler

This one is a bit of a copout, but if rain doesn't postpone today's matchup between the Los Angeles Dodgers and Colorado Rockies at Coors Field, you'll want players from both sides in your lineup tonight.

The Dodgers are slated to tee off against struggling Rockies left-hander Austin Gomber, but their salaries reflect how good their setup is -- each of Shohei Ohtani ($5,200), Teoscar Hernandez ($4,500), Freddie Freeman ($4,100) and Will Smith ($4,000) rank among the 10 highest salaries on the slate.

With that in mind, it might make more sense to pick one or two Dodgers studs to start tonight while building the rest of your lineup around a Rockies stack.

The Rockies will get to hit against Walker Buehler, who still seems to be finding his footing after missing all of last year due to injury. He's thrown to a 4.94 ERA on the year with an elevated 5.4% home run rate and a below-average 19.7% strikeout rate, marking career-high and career-low rates, respectively, in those metrics for the former ace.

Ezequiel Tovar is the highest-projected Rockies batter tonight and carries a $3,700 salary to match his 13.0-point projection. Brenton Doyle ($3,300) and Ryan McMahon ($3,500) come in just behind Tovar and are projected for 12.0 FanDuel points apiece.

After veteran lefty Charlie Blackmon ($3,400), the rest of Colorado's batters clock in closer to a $3,000 salary. Nolan Jones has five walks and five hits since returning from the injured list last week -- he started the year off slowly before hitting the injured list but still has a .835 OPS over the last year and is trending up now. Michael Toglia ($3,000) is projected for a solid night at 11.2 FanDuel points while Jacob Stallings ($2,900) has been batting cleanup lately and notched his fourth home run of the season last night.

The Dodgers obviously offer huge upside, but this should be a high-scoring environment all-around -- according to today's MLB odds at FanDuel Sportsbook, this game's 11.0-run total is the night's highest clip by a wide margin.

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The above author is a FanDuel employee and is not eligible to compete in public daily fantasy contests or place sports betting wagers on FanDuel. The advice provided by the author does not necessarily represent the views of FanDuel. Taking the author's advice will not guarantee a successful outcome. You should use your own judgment when participating in daily fantasy contests or placing sports wagers.