Weather to Watch
Washington at Cincinnati | Great American Ball Park | Clear, 60F | Wind: 12.3 mph NNW
Wind blowing straight out to center adds about 5% to home run carry and a couple percent to total runs. With Chase Burns vulnerable from the left side and a high-pull WSH lineup, this is the one weather edge of the slate worth chasing.
Pittsburgh at Colorado (in Pittsburgh) | PNC Park | Overcast, 49F | Wind: 11 mph WNW
Wind out to right at PNC tilts the LHH side mildly, but the cool temp blunts most of the carry. Watch the radar for late changes; precipitation chance sits at 4% so play it as a baseline neutral park.
Minnesota vs Miami | Target Field | Overcast, 71F | Wind: 14.7 mph S
Crosswind is brisk but not a real HR factor. The temperature is fine, no precip risk, treat this as a normal Target Field game. Nothing to fade or push.
The other four games are either domes (HOU vs SEA at Daikin Park, MIL vs SD at American Family Field) or neutral wind/temp (NYM vs DET at Citi, ATH vs STL at Sutter Health). No reason to lean weather in any of them.
HR Calls
Shea Langeliers (ATH) $5,900 vs Michael McGreevy
Langeliers sits at the top of the hybrid model and the profile is doing all the talking. He carries a 17.1% barrel rate, a .307 xISO, a 50% fly-ball rate, and 75 mph bat speed against a starter who is running on borrowed time. McGreevy has a 2.18 ERA propped up by a .200 BABIP and an 87.5% strand rate, but his xFIP sits at 3.68 and he gives up a .227 xISO and a .501 xSLG. Sutter Health Park plays as a 114 for RH power, and the ATH lineup gets to keep hammering McGreevy a third time through.
Christian Walker (HOU) $4,000 vs Luis Castillo
Walker at four grand is the cleanest salary play of the night. He owns a 13% barrel rate, a .256 ISO, and a 41.5% pull rate, and he gets a Castillo who has been crushed regardless of which side he is facing this year. The HOU offense ran a .319 wOBA and 101 wRC+ as RHH vs RHP, and Castillo has allowed a 12.1% barrel rate with a .192 xISO. Dome neutralizes weather, but the matchup is everything you want from a value HR call.
James Wood (WSH) $6,500 vs Chase Burns
This is the environment call of the night. GABP is playing 114 for RH power and the wind is blowing straight out, which tacks roughly 5% onto HR carry. Wood is a six-foot-seven left-handed monster with a 27.6% barrel rate, a .346 xISO, and a 53% hard-hit rate. Burns owns a sparkly 2.11 ERA, but his vs-LHH split tells a different story: a 3.57 ERA, a .375 wOBA, and a 21.7% HR/FB rate to lefties. Wood is a borderline elite power lefty walking into the exact split Burns cannot handle, in the exact park the wind is helping.
Stacks to Target
1. SEA vs Mike Burrows (R) | Implied Total: 4.88 | ROO Score: 5.9/10
Chalk stack
Seattle is the cleanest stack on the board and the model is calling it that way. Burrows has been a disaster from the left side: an 8.21 ERA, a .419 wOBA, and a 18.75% HR/FB rate to LHH on 23 innings of work. Seattle runs out a deep lefty-heavy lineup, and the team's LHH vs RHP wRC+ sits at 117.8, with elite barrel guys throughout. Houston's bullpen is graded as a real vulnerability on this slate too, so the back-end of the order plays for late damage if Burrows gets pulled early. Ownership will be heavy here, especially on Donovan and Raleigh, so the construction angle is to anchor your stack on the LHH bats and pivot the back end to less obvious names.
Core pieces: Brendan Donovan (L, leadoff), Cal Raleigh (switch but elite pull rate, batting 4th), Josh Naylor (L, 3-hole), Luke Raley (L, 6-hole on a .324 xISO).
2. STL vs Jacob Lopez (L) | Implied Total: 4.65 | ROO Score: 5.9/10
Pivot stack
This is the highest-total game on the slate (9.5) and the pivot to the SEA chalk. Lopez is a southpaw who gets ruined by righties: a 5.61 ERA vs RHH, a .398 wOBA, and a 53.5% fly-ball rate, which is exactly the worst combination for a hitter park. STL's RHH vs LHP wRC+ is 123.3, the best mark of any platoon group on the slate. Sutter Health Park plays as 112 for LH power and 114 for RH power, so the team total ceiling is real. The opposing bullpen is mid-tier rather than elite, so a late-inning second-look becomes meaningful if STL pushes Lopez out early.
Core pieces: Jordan Walker (R, 3-hole, .234 xISO), Masyn Winn (R, 5-hole), Ivan Herrera (R, DH in the 2-spot vs LHP), JJ Wetherholt (L) leadoff covers the L side. Lower expected ownership than the SEA stack, and the same level of upside.
3. WSH at Chase Burns (R) | Implied Total: 3.27 | ROO Score: 3.7/10
Leverage stack
WSH at a 3.27 implied total looks like a fade on the surface, but this is the dirtiest leverage spot on the slate. Burns has a 2.11 ERA that is fully a mirage from his RHH split: vs LHH he sits at a 3.57 ERA, a .375 wOBA, and a brutal 21.7% HR/FB rate. WSH's left-handed bats walk into that, the wind is blowing out at GABP for a 5.3% HR boost, and the Cincinnati bullpen graded out as a true weakness on the model (7.4 bullpen vulnerability). Ownership will be single-digit on these guys outside of maybe Abrams. If WSH posts 5+ runs, it is going to win contests because the field will be empty on this side.
Core pieces: James Wood (L, leadoff, 27.6% barrel rate), CJ Abrams (L, 4-hole, .220 xISO), Daylen Lile (L, 5-hole on a .343 form ISO), Brady House (R, 3-hole at a 124 park factor for RH power).
Pitchers
Pricing is bifurcated tonight. There are two arms in the ace tier, three real mid-tier plays, and a couple of GPP punts at the bottom. The cleanest cash anchor is at the top, but the GPP leverage lives in the $6K to $8K band.
Nolan McLean (NYM) vs DET | $9,300 | CASH
McLean is the cash pitcher of the slate and it is not particularly close. He owns a 2.78 ERA backed by a 2.38 FIP and a 2.51 xFIP, with a 32.6% K rate and a sub-7% walk rate over 45 innings. Detroit comes in with the slate's lowest implied total at 2.99 and a lineup that has struggled vs ace-level RHP all year. Win probability is 63%, K upside is the highest on the slate, and the floor is excellent relative to salary. Standard play in any cash lineup.
Kyle Harrison (MIL) vs SD | $8,800 | CASH
Harrison gets a Padres lineup at a 3.40 implied total in a dome environment, with a 60% home win probability behind him. He has run a 2.41 ERA over 33 innings with a 29.3% K rate, and his FIP and xFIP both sit comfortably in the 3.25 to 3.30 range. The Padres' team wOBA vs LHP is below league average in two of the four platoon buckets, so the strikeout ceiling plays. He is the second cash arm if you want to roster two and the SP1/SP2 stack-anchor combo is doable on this slate.
Chase Burns (CIN) vs WSH | $9,800 | GPP
Burns has a 2.11 ERA, 26% K rate, and faces a Washington lineup implied for 3.27. On paper this is a wedding ring of a matchup. The catch is the LHH split: Wood, Abrams, and Lile all hit the exact platoon side that has hurt him, and the wind at GABP is pushing carry out by 5%. The strikeout ceiling is real, but he is a higher-variance roster than McLean. Use him in GPPs where you can stomach a 6-strikeout, 2-HR-allowed line that still hits 18 to 22 points.
Zebby Matthews (MIN) vs MIA | $6,200 | GPP
Matthews at $6.2K is the punt-style GPP that lets you afford two studs at hitter. He gets a Miami lineup implied for 3.97 at Target Field, where the LH side of MIA is below-average. His underlying numbers (3.81 xFIP, 3.82 SIERA) are better than his ERA suggests, the strikeout rate has trended up, and the price tag is the entire reason to roster him. He is not a cash play, but as a GPP saver who unlocks Soto + Walker pairings, the EV is there.
Pitcher Regression to Watch
Michael McGreevy: Negative Regression Candidate
McGreevy's 2.18 ERA looks shiny but the underlying screams trouble. He is sitting on a .200 BABIP, an 87.5% strand rate, and a 19.6% K rate, none of which holds up over a 30-start season. His FIP is 3.75, his xFIP is 3.68, and the gap between the surface ERA and his peripherals is one of the biggest on the board. He gives up a .227 xISO and a .501 xSLG, both above league average. The ATH stack write-up above is built on this exact regression: today is the day the math comes due.
Luis Castillo: Positive Regression Candidate
Castillo is the opposite story. A 6.57 ERA looks like a meltdown, but the underlying says he is fine: a 4.54 FIP, a 4.34 xFIP, a 20.8% K rate, and a .364 BABIP that is well above sustainable. His strand rate is 59%, eight points below league average. He has been hit hard but a lot of that has been BABIP and sequencing noise. The Christian Walker HR call above is the right side of this regression. From a roster construction standpoint, this is a do-not-over-stack HOU warning: the matchup is good but Castillo is not the donkey his ERA implies, so an 8-run HOU number is not the median outcome.
Final Thoughts
The cash core today is Nolan McLean, Cal Raleigh or Brendan Donovan as the SEA stack anchor, and Christian Walker as the salary-saving HR play. That trio gets you to a stable floor with room to fill out the rest of the roster on mid-tier hitters and a punt SP if you want to double up on offense. The best game-stack candidate is ATH vs STL: it is the highest-total game on the slate (9.5), both teams crush their opposing pitcher's hand, and the park plays clean for power on both sides. A 4-3 stack with three from STL (Walker, Winn, Herrera) and four from ATH (Langeliers, Soderstrom, Cortes, Rooker) is the construction with the most game-stack equity. Throw Jordan Walker as your bring-back on the STL side from the four-spot if you want to capture the back-and-forth game script.
For GPP leverage, the WSH lefty stack is the contrarian path of the night with single-digit ownership at the key power spots. STL is the cheaper-priced pivot off the SEA chalk and frees up salary for two ace pitchers. If SEA is going to be 35%+ owned, the leverage on that stack is not fading it, it is owning correct construction: anchor Donovan, Raleigh, and Naylor, then pivot to Cole Young or Dominic Canzone instead of locking in Raley. The 6-9 spots in big chalk stacks are where contests get decided, especially in single-entry and small-field GPPs.
Tools used for this slate
Every number in this playbook comes off the free BankrollSZN tools: today's MLB DFS projections, the MLB home run predictor, first-pitch weather for every game, today's starting pitchers, and the free MLB lineup optimizer.