This is a game built for the earned runs under. Garrett Crochet is punching out hitters at a 31.9% clip with 15 strikeouts in just 11 innings this season. On the other side, Milwaukee's Tobias Misiorowski has been even more electric, racking up 18 K in 11 IP. When both starters are generating this much swing-and-miss, contact is limited, balls in play are scarce, and runs become hard to manufacture. The game total is set at 6.5. Two K machines, low total, take the under on Crochet's earned runs.
Let's start with the number that defines this play: 31.9%. That's Garrett Crochet's strikeout rate through his first two starts of 2026. Nearly one out of every three plate appearances against him ends in a strikeout. Fifteen punchouts in just 11 innings pitched. The guy is a buzzsaw, and he has been since the moment Boston acquired him. His 255 strikeouts in 2025 weren't a fluke. They were the logical result of a pitcher with elite velocity, a devastating slider, and the command to put both pitches exactly where he wants them.
What does a 31.9% K rate actually mean for earned runs? Everything. When a pitcher is striking out nearly a third of the hitters he faces, those hitters aren't putting the ball in play. They're not finding holes in the defense. They're not advancing runners. They're walking back to the dugout. Every strikeout eliminates any chance of a ball in play producing a run. It's the cleanest, most efficient way to get outs, and Crochet does it at a rate that puts him in the top 5% of all starting pitchers in baseball.
There's a direct, measurable correlation between high strikeout rates and low earned run totals. Pitchers who strike out 30%+ of hitters historically carry ERAs below 3.00. The math is simple: strikeouts eliminate base traffic. Less base traffic means fewer scoring opportunities. Fewer scoring opportunities mean fewer earned runs. Crochet's 31.9% K rate isn't just impressive in isolation. It's a predictor. It tells you that his earned runs will be suppressed because the mechanism that creates earned runs, balls in play, is happening less frequently than it does against virtually every other starter in the league.
Crochet's pitch mix is what makes this sustainable. The fastball sits 97-98 with arm-side run that makes it hard to barrel. The slider is a wipeout pitch that generates whiffs at an elite rate. And he's shown the ability to mix in a changeup that gives hitters a third look to worry about. When you're a left-hander throwing 98 mph with a plus slider, right-handed hitters are uncomfortable in the box before the first pitch. Left-handed hitters fare slightly better but still can't catch up to the heater. The result is a strikeout rate that would make most closers jealous, generated by a guy pitching 6+ innings per start.
Here's where this game gets really interesting for the earned runs under. It's not just Crochet who's punching out everyone in sight. Tobias Misiorowski, Milwaukee's starter, has been even more electric. Eighteen strikeouts in 11 innings pitched this season. That's an absurd pace. When both starters in a game are generating this level of swing-and-miss, the entire run-scoring environment changes.
| Pitcher | Team | IP | K | K Rate | K/9 |
|---|---|---|---|---|---|
| Garrett Crochet | BOS (LHP) | 11.0 | 15 | 31.9% | 12.27 |
| Tobias Misiorowski | MIL (RHP) | 11.0 | 18 | ~35% | 14.73 |
| Combined | -- | 22.0 | 33 | ~33% | 13.50 |
Thirty-three combined strikeouts in 22 innings between these two starters. That's 1.5 strikeouts per inning. When both pitchers are operating at this level, the game environment becomes fundamentally hostile to run scoring. Hitters on both sides are going to spend more time walking back to the dugout after strikeouts than running the bases. The 6.5 game total reflects this reality. Oddsmakers see two K machines and they price the total accordingly.
Both pitchers are well above the MLB average strikeout rate. Crochet at 31.9% and Misiorowski at roughly 35% are operating in elite territory. When the average starter strikes out about 22% of hitters, these two are each striking out 10+ percentage points above that baseline. That's an enormous difference in the amount of contact being made, the number of balls in play, and consequently the number of runs being scored.
BOS at home after an under result with a low game total: 1-8 Under (11.1%), averaging 6.0 total runs. When Boston plays at home in these specific conditions, the game goes under at an overwhelming rate. The 11.1% hit rate on the over tells you that 89% of the time, these games stay under the total. Combined with two strikeout-heavy starters and a 6.5 game total, the earned runs under for Crochet becomes one of the strongest situational plays on the board tonight.
The edge scanner trend aligns perfectly with the pitching matchup data. Low totals, low contact rates, home environment for Crochet, and a historical tendency for these games to stay under. Every data point is pointing in the same direction. When the quantitative data (K rates, game total) agrees with the situational data (edge scanner trends), you have a strong convergence of factors supporting the same conclusion: runs are going to be scarce tonight at Fenway.
Let's be honest about the one thing that makes this play scarier than the other ER unders on tonight's board.
Fenway Park is not a pitcher-friendly environment. The Green Monster in left field turns routine fly balls into doubles. The short right field porch allows opposite-field home runs. And the tight dimensions create an environment where balls in play can turn into extra-base hits quickly. Fenway's park factor for runs historically sits above 1.00, meaning more runs are scored here than at a neutral venue. This doesn't negate Crochet's elite stuff, but it does mean the margin for error is thinner than if this game were at PNC Park or loanDepot Park.
The Fenway factor is real and shouldn't be dismissed. But here's the counterargument: Crochet's strikeout rate minimizes the impact of the park factor. Park factors affect balls in play. If hitters aren't putting the ball in play because they're striking out at a 31.9% clip, the Green Monster doesn't matter. A strikeout in Fenway is the same as a strikeout in San Diego. Crochet's ability to bypass the park's dimensions entirely through swing-and-miss is what makes this play viable despite the venue.
Garrett Crochet is striking out hitters at a 31.9% rate with 15 K in 11 IP. Misiorowski on the other side has 18 K in 11 IP. The game total is 6.5. The edge scanner shows an 89% under rate in this exact home situation. Two elite swing-and-miss arms means low contact, limited base traffic, and suppressed run scoring. Yes, Fenway adds risk, but Crochet's K rate neutralizes the park factor by keeping balls out of play entirely. When a pitcher is this dominant at generating strikeouts, earned runs become scarce regardless of venue. Take Crochet's ER under in a game that has pitching duel written all over it.