MLB DFS Pitcher Rankings Today (8/18): Best DraftKings SPs

Pitcher is the one decision that shapes everything else you do in MLB DFS, and tonight's 9-game DraftKings main slate (7:10 p.m. ET lock) hands us an unusual version of it. The two best arms on the board are priced $1,000 apart, and the field has already decided it likes the cheaper one a lot more.

Kyle Harrison — one of the featured players on today's slate.

The Quick Answer

Milwaukee's Kyle Harrison ($10,000) is our No. 1 pitcher on tonight's MLB DFS slate, edging the Cubs' Kevin Gausman ($9,000) on the Stokastic Sims board, with Boston's Ranger Suarez ($8,700) and Atlanta's Tyler Mahle ($8,000) next. Our favorite SP2 value is Texas' Cal Quantrill at $7,000, and the leverage play is Minnesota's Zebby Matthews at 7.3% projected ownership. The full 12-arm rankings table, the case for paying up, and the Coors-adjacent trap to avoid are all below.

Tonight's MLB DFS Pitcher Rankings From The Stokastic Sims

These rankings come straight from the Stokastic Sims, which simulate tonight's slate thousands of times to produce projections, projected ownership, and the number I lean on hardest for this decision: the top-pitcher rate, which is simply how often each arm finishes as the slate's highest-scoring pitcher across all of those simulations. Projections updated at 5:40 p.m. ET today; every probable below is lineup-confirmed except where noted.

Sims projections, projected ownership, and top-pitcher rates from the Stokastic MLB DataHub, pulled at 5:40 p.m. ET on Aug. 18.

The row that frames the whole slate is the gap between the top two. The Sims call Harrison versus Gausman a near coin flip to be the night's top scorer, 24.2% to 23.9%, yet the field is projected to roster Gausman at 32% and Harrison at 23.3%. When the simulations say two pitchers are that close and the ownership is that far apart, the board is telling you where the leverage lives. The rest of these rankings, and the SP2 call underneath them, flow from that one gap.

Every number in tonight's rankings comes from the Stokastic Sims. Projections, ownership, top-pitcher rates, and the stacks to pair with your SP1 update all day in the MLB DataHub, and the Sims build your DraftKings lineups straight from them. Code PITCHER10 takes 10% off your first week or month.

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Kyle Harrison Is The No. 1 Pitcher Tonight

Harrison's skill profile is the outlier on this board. The Brewers lefty is striking out 29.7% of the hitters he faces this season with a 23.4% K-BB rate, and his 11.0 K/9 (114 strikeouts in 93.1 innings) is comfortably the best strikeout rate of any starter on the slate. He is 9-3 with a 2.99 ERA, and he gets it at home against a Mariners lineup that whiffs at a 22.9% clip, tied for the seventh-highest strikeout rate in baseball.

The matchup context stacks on top of the skills. Seattle carries a 3.6-run implied team total tonight, tied with Arizona for the lowest of any offense on the slate, which means the market sees the Mariners as one of the two offenses least likely to do damage. A high-strikeout arm facing a slate-low implied total is the cleanest pay-up case you can draw up, and it is why I have no interest in getting cute at the top: Harrison is the SP1 in my builds even at $10,000.

The counter-argument is real and worth naming: Gausman costs $1,000 less for nearly the same projection, and in a cash game I understand taking the savings. But in tournaments, paying the extra $1,000 buys you the better strikeout profile, the softer opponent, and nine points of ownership. That is a trade I will make every time.

The Chalk: What You Get With Kevin Gausman At 32%

Gausman is completely playable, to be clear. The White Sox strike out 24.0% of the time (sixth-most in MLB), his 2.5 BB/9 keeps the WHIP manageable, and Wrigley Field only plays big when the wind does. The Sims give him essentially the same top-pitcher odds as Harrison, and at $9,000 he leaves an extra $1,000 for bats.

What you are not getting at 32% ownership is any separation when he is good. His season-long numbers (4.53 ERA, 23.5 K%, 17.0 K-BB%) are a full tier below Harrison's, and a 6-11 record tells you how rarely the run support has bailed him out, which makes the DraftKings win bonus thinner equity than the price implies. If a third of the field has him and he throws six strong, you have kept pace. If Harrison out-scores him, nearly a third of your opponents took the zig and you took the zag. That asymmetry is the whole GPP case, and it is the same logic our how to win DFS tournaments guide builds from: ownership is part of the price.

The Middle Tier: Suarez, Mahle, Thornton And The Miller Problem

Because the top two soak up most of the ownership, the $8,000-$8,700 tier is where quiet edges hide.

Ranger Suarez ($8,700, BOS vs. ARI): the best pure run-prevention arm here, with a 3.25 ERA and just six home runs allowed in 108 innings, a 0.50 HR/9 that matters at Fenway. Arizona's 3.6 implied total ties Seattle for the slate's lowest, so Suarez draws the same market-approved matchup Harrison does. The catch is the path: the Diamondbacks strike out just 19.3% of the time, the second-lowest rate in baseball, so Suarez wins on outs and innings, not Ks. His 14% ownership is fair, and he is a fine cash-game SP1 for the exact reason he is a modest GPP one.

Tyler Mahle ($8,000, ATL vs. MIN): quietly carries a 23.4 K% into a Twins lineup with a 4.2 implied total, and at 11.5% ownership he is my favorite pivot in this band. The 4.64 ERA is the wart, and it is a real one, but the strikeout rate is what the DraftKings scoring pays.

Zac Thornton ($8,200, NYM vs. SD): owns a shiny 2.78 ERA through eight starts, but a 16.4 K% caps his DraftKings ceiling; the Sims see it the same way, ranking him fifth despite the surface stats.

Then there is Bryce Miller at $9,500, the other half of the Harrison game. The ratios are excellent (0.99 WHIP, 25.4 K%, a 4.8% walk rate), but he costs $500 more than Gausman while facing a Brewers offense with a 4.4 implied total, and his 1.48 HR/9 is the kind of number that turns one mistake into a multi-run crater. Sixth on the board at his price makes him the easiest fade of the night's expensive arms.

SP2 Values: Pay Down Without Punting

The pay-up-at-SP1 plan only works if the second slot gives salary back, and tonight it does. Cal Quantrill ($7,000) is the steadiest version: a 3.44 ERA on the season, and Washington's 3.7 implied team total is the next-lowest on the slate after the two 3.6s. His 16.4 K% means you are drafting outs and win equity rather than strikeouts, which is exactly what an SP2 is for.

For leverage, the one I keep coming back to is Zebby Matthews at $7,700 and 7.3% projected ownership, the number I promised up top. The Twins righty's 7.6 K/9 is ordinary; the price and the ownership are doing the work, because the Sims rank him eighth on the board while the field ranks him nowhere. Be honest about why he is cheap: a 5.34 ERA, a 1.78 HR/9, and a Braves lineup with a 5.0 implied total. He is a tournament-only piece whose good nights land in low-owned lineups, not a safe floor play.

One name to handle carefully in this range: Cristian Javier ($7,500) has only 32.1 innings this season with a 6.68 ERA and a 10.7% walk rate. The Angels' 25.2% strikeout rate is the bait; the command is the hook. And note the Athletics' starter situation was not lineup-confirmed when these projections ran, so treat that game's arms as off-limits until it is.

A Worked Example: Fitting The Pay-Up Under DraftKings' $50,000 Cap

Here is what the pay-up plan actually costs on a real DraftKings build, which uses two pitchers and eight hitters under a $50,000 cap. Harrison ($10,000) plus Quantrill ($7,000) is $17,000 in pitching, leaving $33,000 for eight bats, an average of $4,125 per hitter. Swap Quantrill for Matthews ($7,700) and the leverage build leaves $32,300, or about $4,037 a bat. The Gausman-plus-Quantrill chalk route ($16,000 total) buys you $34,000 of hitting, roughly $125 more per bat than the Harrison build. That last comparison is the honest cost of the No. 1 pitcher on this slate: $125 per hitter slot, in exchange for the slate's best strikeout profile and a nine-point ownership discount. On a 9-game slate with mid-$3K bats worth rostering, I will pay it.

The Fades: Kelly At Fenway And The Coors Trap

Merrill Kelly at 4.0% ownership looks like leverage until you read the profile: a 15.1 K%, a 1.80 HR/9, and 25 homers allowed on the season, walking into Fenway Park. Low ownership on a bad spot is not leverage, it is just a bad spot.

The sneakier trap is Eric Lauer at $6,000. The field sees a Dodgers starter as a heavy favorite and a cheap salary; the Sims see a 2.01 HR/9 arm pitching at Coors Field, the best home-run park in baseball, against a Rockies lineup with a 5.1 implied total at altitude. His 9.6 projection ranks 14th on the board. Remember the logic from the Harrison section: we pay up for arms facing the slate's lowest implied totals. Lauer is that bet inverted, a cheap arm facing one of its highest, and the punt savings are not worth it.

How I'm Building Pitching Tonight

Zoom back out and the pitcher board answers the hitting question too. The same implied totals that make Harrison and Suarez pay-ups mark where the runs are supposed to come from: the Dodgers' 7.2 implied total at Coors is the slate's highest by nearly two full runs, with the Cubs next at 5.3. So the build the numbers point to is Harrison at SP1, Quantrill or Matthews returning salary at SP2, and the savings funneled into Dodgers and Cubs bats, the two offenses the market is loudest about. One warning on correlation: a Cubs stack next to Gausman doubles your exposure to one game at Wrigley, while Harrison plus Dodgers bats spreads the risk across two parks. That is the version of tonight I keep landing on.

Pitcher rankings are half the build; the other half is the stacks you pair with them, and our full MLB DFS picks for today covers the hitting side of this same slate. You can see every projection behind this article, including MLB DFS projections, ownership and stacks in the DataHub, and try the Sims free before lock. More slate-by-slate breakdowns live in our MLB DFS article hub.

MLB DFS Pitcher Rankings FAQ

Who is the best pitcher on tonight's MLB DFS slate? Kyle Harrison ($10,000) ranks No. 1 on the Stokastic Sims board for Tuesday, Aug. 18. He leads all slate starters with a 29.7% strikeout rate, and Seattle's 3.6 implied team total is tied for the lowest of any opponent on the slate.

Who is the best value pitcher on tonight's MLB DFS slate? Cal Quantrill at $7,000 is our top SP2 value, facing a Nationals offense with a 3.7 implied total. Zebby Matthews ($7,700) is the higher-risk leverage version at 7.3% projected ownership.

Should I pay up for pitching or punt SP2 tonight? Pay up at SP1: the top of this slate is strong and the drop-off after $8,000 is real. Rather than a true punt, pay down to the $7,000-$7,700 range, where Quantrill and Matthews still carry positive Sims projections. The full-punt options ($6,000 and below) all draw bad parks or bad implied totals tonight.

How are these MLB DFS pitcher rankings made? The Stokastic Sims simulate tonight's slate thousands of times using projections, park factors, and confirmed lineups. The rankings above sort starters by Sims projection, with projected ownership and top-pitcher rate (how often each arm finishes as the slate's top scorer in those simulations) shaping the pay-up and leverage calls.

Get Every Projection Before Lock

Tonight's edge came from three numbers the field mostly ignores: a top-pitcher rate that called the SP1 race a coin flip, an ownership gap that said the field disagreed, and the implied totals that broke the tie. The Stokastic MLB Data + Sims package gives you all of them for every slate: projections, projected ownership, leverage, Top Stacks, and the Sims that build DraftKings and FanDuel lineups from the same numbers in this article. Use code PITCHER10 for 10% off your first week or month.

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