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

Cleveland Guardians

Implied Total: 5.70 | Opposing Pitcher: Ty Blach

The Cleveland Guardians scored 13 runs against the Colorado Rockies in last night's outing, so you can bet we're going to run it back with them for our stacks today.

They'll square off against left-hander Ty Blach in tonight's affair, giving them a good shot at racking up even more runs. This contest has the highest total (10.5) on FanDuel Sportsbook's MLB Odds market by a full run.

Blach is having another rough year with the Rockies. He has pitched to a 4.55 ERA -- his best rate since 2018 -- and has a 1.30 WHIP on the season, but he's striking out just 3.9 batters per 9 innings. That low K rate helps explain why his underlying 4.82 skill-interactive ERA (SIERA) and 5.41 expected ERA indicate he's actually overperforming right now. According to MLB's Statcast data, batters have an expected .313 batting average against him this year -- a mark that ranks in just the second percentile this year.

He could be in for a rough, short night, leaving the rest of the Rockies' league-worst relievers to finish the game out. It's an ideal setup for fantasy points at Coors Field.

Obviously, the Guardians' salaries are going to reflect these ideal circumstances. If you do stack a few of Cleveland's hitters, you'll want to target values elsewhere in your lineups. That said, it's hard to beat Jose Ramirez's 15.5-FanDuel-point projection or Andres Gimenez's 15.3-point projection on today's slate. David Fry (15 FanDuel points) is projected like one of Cleveland's top hitters again today as his excellent Tuesday performance brought his OPS up to 1.115 on the season.

Ramirez is salaried at $4,800, but Gimenez and Fry are slightly more accessible at $3,800 and $3,900, respectively. Josh Naylor ($4,100) -- whose excellent bounce-back game we called yesterday -- is also projected for a strong 14.5 FanDuel points in this one. Tyler Freeman ($3,600) didn't get in on the fun last night but is still in a solid spot for fantasy production today.

You kind of have to find reasons not to start Guardians players in your lineups today. With that in mind, this could be a good spot for rookie outfielder Johnathan Rodriguez, who is projected for 10.9 FanDuel points at a $2,500 salary. He would be the fifth-best value play on the slate tonight if he gets the nod, which he has gotten in each of the Guardians' last two matchups with lefties.

Colorado Rockies

Implied Total: 4.80 | Opposing Pitcher: Logan Allen

On the flip side of the same matchup, things don't look too bad for the Colorado Rockies, either. They'll start things off against left-hander Logan Allen, who has struggled to a 4.80 ERA in his second season in the Majors. Allen has recorded a 1.46 WHIP and is allowing opposing batters to post a .857 OPS on the year, so he could get into some trouble at Coors Field tonight.

Ryan McMahon ($3,600) is the Rockies' top projected hitter on the night. He is the only Rockies hitter with over 100 plate appearances and an OPS over .800, so naturally, he'll be the highest-salaried player on the squad, as well. Behind him, Ezequiel Tovar could be a bit of a value at his $3,400 salary. He's projected for a solid night, with 12.2 projected FanDuel points against the Guardians.

Kris Bryant hit his second home run of the year last night and has a $2,800 salary for today's contests. It's hard to recommend a player with his recent track record, but we've all seen Bryant play at a high level in earlier stages of his career.

While it's hard to get hyped over Bryant, Hunter Goodman looks like a strong play at his matching $2,800 salary. He has a team-high .615 wOBA against left-handers this year and is tied with McMahon for the shortest odds to hit a home run (+500) on the team. He's already mashed two dingers against lefties this year in just 13 plate appearances.

If Elias Diaz ($3,300) gets the nod tonight, he could be worth consideration, as well. He gets to bat cleanup most nights, putting him in position to notch RBI when the Rockies do get runners on base. That said, he has started in three straight games, meaning he'll likely need to start at DH if he does suit up.

Toronto Blue Jays

Implied Total: 4.78 | Opposing Pitcher: Chris Flexen

The Toronto Blue Jays will continue their series with the Chicago White Sox today, who as a collective are allowing the second-most runs per game in the Majors. That's despite having a legitimate ace in the making in Garrett Crochet, which gives you a sense of how bad things are going for the rest of their pitchers.

It'll be Chris Flexen on the mound tonight -- not Crochet -- so the Blue Jays should be queued up for another slugfest. The 29-year-old righty has a 5.69 ERA and a 1.37 WHIP this year, backed up by a 4.82 FIP and a 4.71 SIERA that would rank seventh-worst in the Majors among qualified pitchers.

The Blue Jays seem to be waking up after a pretty slow start to the year. While they're averaging just 4.02 runs per game on the year (22nd), they have been much better recently and have averaged 4.65 runs per game in May.

The projections at numberFire love Davis Schneider ($3,400), whose 15.9 projected FanDuel points are the most among batters on today's slate. As the Blue Jays' leadoff batter, he's a natural place to start for stacks. If you're working backwards, Kevin Kiermaier -- who bats ninth when he makes the lineup -- is technically the best value play on the slate with his $2,100 salary, according to numberFire's metrics.

The heart of Toronto's lineup has been turning a corner recently, making them pretty appealing for DFS today. If Danny Jansen ($3,200) sticks in the lineup, he'll be projected for 14 FanDuel points (second-most on the team) while Vladimir Guerrero Jr. ($3,800) has a 1.092 OPS over the last week.

Bo Bichette ($3,500) looked like one of the most disappointing batters in the league to open the year but has rallied for a .903 OPS over the last week with a pair of home runs. He's projected for 12.2 FanDuel points and could be in line for a solid night against Flexen. Across their meetings over the last three years, Bichette has hit for a .300 average with as many home runs (1) as strikeouts (1) in those duels.

Earlier this year, it seemed like it might be nearing closing time for George Springer ($3,100), but the veteran has majorly bounced back over the last few weeks. Like many of his teammates, he recorded an excellent .929 OPS over the last seven days and seems to be getting on the right track. He's projected for 10.9 FanDuel points today after recording 21.4 FanDuel points in last night's outing.

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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.