Milwaukee leads the best-of-five NLDS 2-1 heading into Game 4 at Petco Park (10 p.m. ET, FS1). San Diego avoided elimination Tuesday with a 4-3 win. Game 2 starter Michael King closed the final two innings, and Christian Yelich grounded into a game-ending double play behind a strong defensive play from Xander Bogaerts. Tonight Robert Gasser, drafted by the Padres and traded to Milwaukee in the 2022 Josh Hader deal, makes his first career postseason start against his former organization. Walker Buehler starts for San Diego.
Our pick is Under 7.5. Before the case for it, the numbers need to be stated plainly, because they do not line up neatly.
The number
- Pick: Under 7.5 runs - Model probability: n/a. Market-implied probability: n/a. Edge: none recorded. Model confidence field for the pick: none recorded. - Model engine total: 9.0, against a market total of 8.5. The engine flags this as an Over lean, with a model confidence of 64.1.
This is a material discrepancy. The engine's projected total sits 1.5 runs above the pick's 7.5 line. Our model does not support this Under with a quantified edge. The engine also references a market total of 8.5, not 7.5, so the line attached to this pick and the engine's market reference also differ. We are publishing the pick as logged. Readers should treat it as a judgment call built on the pitching and series context below, not as a model-backed edge. The outcome will be recorded on the public ledger either way.
Why the model leans this way
The engine's lean is toward runs, not away from them. The rationale for the Under therefore comes from the researched game context, not from model output.
Starting pitching. Gasser went 5-5 with a 3.87 ERA across 21 games (20 starts). Over his last six appearances he allowed 6 earned runs in 32.1 innings, a 1.67 ERA. This will be his first appearance of any kind against San Diego, so the Padres' hitters have no prior looks at him. Buehler's 2026 line is weaker at 9-6 with a 4.63 ERA. His postseason résumé is substantial: 4-4 with a 3.04 ERA across 19 career playoff appearances, 18 of them starts. San Diego went 10-3 in his second-half starts.
Bullpens. Both relief corps arrive in usable shape. Padres closer Mason Miller is back from the paternity list and available. Milwaukee has Aaron Ashby and Trevor Megill rested. In an elimination game for one side and a clinching opportunity for the other, both managers have reason to shorten the game with their best relievers.
Series scoring. Game 3 finished 4-3, which is 7 runs and would have landed under 7.5.
Park. The park factor is 1.0, which is neutral. Petco adds nothing to this case and subtracts nothing.
Offense. The engine rates Milwaukee's offense at 53.4 and San Diego's at 40.7. The lower Padres figure is consistent with a run-suppressed environment on one side of the ledger.
The case against
The Under needs a lot to go right, and several factors work against it.
The Padres start fast. San Diego has scored first and built a multiple-run lead in all three games of this series. Early runs against a starter making his postseason debut are a realistic path past 7.5. Gasser's 32.1-inning hot stretch is a small sample. Facing his former club in his first playoff start adds an unquantified variable.
Buehler's 2026 form. A 4.63 ERA this season is well above his career playoff mark. Milwaukee's offense rating of 53.4 is the stronger of the two. If Buehler pitches to his 2026 numbers rather than his October résumé, the Brewers can contribute a large share of the runs on their own.
Momentum signals are mixed. The engine lists Milwaukee as having won 5 straight and San Diego 2 straight. Those figures do not cleanly reconcile with Tuesday's Padres win, so we weight them lightly. Both clubs did go 8-2 over their last 10 games. The 103-win Brewers have also lost 12 straight road playoff games dating to last season. Pressure to break that streak could cut either way on scoring.
Health. Padres 1B Gavin Sheets is listed day-to-day. His status could shift the lineup in ways that are hard to price.
Ordinary variance. A one-run total margin is thin. A single crooked inning, one defensive miss, or a bullpen arm without its command can move a game from 7 runs to 8 or more. Even well-supported Unders at this range lose often. Without a quantified edge, a reasonable expectation is close to a coin flip, possibly worse.
Bottom line
The pitching context is the strongest argument for the Under: Gasser's recent run, Buehler's playoff track record, and two available bullpens. The engine's own 9.0 total points the other way. This pick carries real risk and no recorded edge, and it will be logged on our ledger as a win or a loss.
21+ only. Predictions involve risk; play responsibly and within your limits.