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: 4.70 | Opposing Pitcher: Dakota Hudson (R)

The Minnesota Twins have the slate's highest implied total (4.70) by a comfortable margin for their game against the Colorado Rockies. Although we typically look to attack the Rockies at Coors Field, the Twins can still do plenty of damage with Dakota Hudson on the bump for the visitors.

Hudson has been dreadful this season, even by the standards of a Colorado pitcher. Through 12 starts, Hudson owns a 5.25 ERA and 1.52 WHIP. His ERA indicators -- 5.46 xERA, 5.12 xFIP, and 5.36 SIERA -- aren't any better. On top of that, Hudson has a 12.6% K rate and 11.9% walk rate.

Granted, some of that is inflated by Coors Field, but the road splits still aren't great. Away from home, Hudson has 3.41 ERA and 4.55 FIP despite a .211 BABIP.

The Twins aren't world-beaters against righties, but they're around league-average in wOBA (.306) and wRC+ (100) in the split while ranking in the top five in ISO (.164). But they also don't have a single hitter salaried greater than $3.5K, making them a handy stack if you roster one of the high-salary pitchers.

Royce Lewis ($3,400) is the headliner. He's posted an absurd .534 wOBA and 30.8% barrel rate in a limited sample this season, cracking double-digit FanDuel points in three of six games. Dating back to last season Lewis has a .410 wOBA and .972 OPS against right-handed pitchers. Among Twins, he has the shortest odds to record 2+ total bases at -110.

Carlos Correa ($3,100) and Ryan Jeffers ($2,900) both have wOBAs north of .350 and an OPS greater than .800 against righties, so they're strong building blocks, too. Correa has been swinging a hot bat of late, notching multi-game games in three of his last four outings.

From the leadoff spot, Trevor Larnach ($2,900) is well positioned to rack up counting stats with strong righty splits of his own. Against righties, Larnach has a .342 wOBA and .781 OPS. He could benefit from Hudson having surrendered a .377 wOBA to opposing lefties.

I'd be remiss if I didn't mention Max Kepler ($2,700) and Alex Kirilloff ($2,500). Our projections peg Kepler for 14.1 FanDuel points and Kirilloff for 12.3 FanDuel points, making the lefties the first and third-best point-per-dollar values on the slate (as of early Monday). Kepler has a .716 OPS against righties while Kirilloff has a .684 OPS in the split.

Jose Miranda ($2,700) and Byron Buxton ($2,600) are the other two names I have interest in. Miranda has stellar .342 wOBA against righties while Buxton boasts this game's shortest odds to hit a home run at +430.

Milwaukee Brewers

Implied Total: 4.29 | Opposing Pitcher: Jose Berrios (R)

Despite a 2.80 ERA, Jose Berrios's profile isn't anything the Milwaukee Brewers should be afraid of. Berrios' ERA indicators -- 4.41 xERA, 4.10 xFIP, and 4.18 SIERA -- aren't scary, and he's running a significantly better BABIP (.259) and strand rate (87.8%) relative to his career averages.

We've already seen Berrios surrender eight runs in a single game this season -- something within Milwaukee's range of outcomes tonight. For the season, the Brewers have the second-best wOBA (.334) and third-best wRC+ (122) against righties.

Christian Yelich ($3,900) and William Contreras ($3,600) are probably going to be the chalk Brewers and for good reason. Yelich has a .384 wOBA and .890 OPS against righties, and Contreras isn't far behind with a .381 wOBA and .873 OPS in the split. They're both averaging more than 12.0 FanDuel points per game this season.

Willy Adames ($3,500) is always in a good spot for counting stats as Milwaukee's cleanup hitter, though his right-handed splits aren't ideal at this salary. If you're rolling with Yelich and Contreras, I'd rather dip down to Brice Turang ($3,200) or Rhys Hoskins ($3,100) -- both of whom have an OPS over .800 against righties. Turang is fresh off a monster weekend, one that saw him go 7-for-13 with four runs, three RBI, and two stolen bases. The leadoff man has +100 odds to score a run tonight.

Value-wise, Joey Ortiz ($2,900) is the name to target. He leads the Brewers with a .932 OPS against righties and has hit safely in nine of his last 11 games.

Kansas City Royals

Implied Total: 4.09 | Opposing Pitcher: Carlos Rodon (L)

With only two totals north of 8.0 runs tonight, I'm not afraid to dig into the weeds a bit for stacks. So, in spite of their meh 4.09 implied total, the Kansas City Royals have my eye.

Kansas City hosts the New York Yankees with lefty Carlos Rodon hurling for the Bronx Bombers. At face value, Rodon isn't a great matchup. He has a 3.09 ERA through 13 starts, racking up eight wins and allowing more than two runs just three times.

But a look under the hood has me bullish on the Royals chances of getting to him early. Rodon's ERA indicators -- 4.24 xERA, 4.26 xFIP, and 3.88 SIERA -- suggest he's been punching a bit over his weight while this season's .250 BABIP and 84.8% strand rate are both much better than his career averages.

Among qualified starters, Rodon has allowed the second-highest fly-ball rate (50.7%), 12th-highest hard-hit rate (42.9%), and 16th highest barrel rate (9.4%).

That puts the Royals -- ranked top 10 in wOBA (.328) and wRC+ (110) against lefties -- in a sneaky-strong spot to pile on the runs at home, where they have the fourth-best record (24-11) in baseball.

Bobby Witt Jr. ($4,500) carries the slate's second-highest salary among hitters, but he's the foundation of any Royals stack. Witt is averaging the second-most FanDuel points per game (14.8) this season and owns a .342 wOBA and .808 OPS against lefties.

That said, Maikel Garcia ($3,300) and Salvador Perez ($3,200) have both quietly been better than Witt against southpaws. In that split, both righties have an OPS north of .870, with Garcia's .250 ISO really standing out. Among Royals, Perez has the shortest odds to hit a home run at +350.

Nelson Velazquez ($3,000) is the other right-handed bat I'd consider thanks to his .345 wOBA against southpaws, and I'd even consider lefty Vinnie Pasquantino ($3,000) as KC's No. 3 hitter. Although he won't have the platoon advantage, Vinnie P has been on a roll of late. He's averaging 15.0 FanDuel points per game over his last nine outings, racking up 10 RBI and seven extra-base hits over that span.

For value, Freddy Fermin ($2,400) and Dairon Blanco ($2,400) are both intriguing given their favorable splits. Fermin has a .388 wOBA and team-leading 46.4% hard-contact rate against lefties while Blanco has an eye-popping 1.036 OPS, albeit in a small sample. Blanco's playing time can be sporadic, but he's scored a run in three straight appearances.

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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.