Two nights ago I wrote that two broken offenses were meeting at Oracle and the only honest number on the board was the under. Monday's game obliged. So did Tuesday's. The Giants beat the A's 2-1 — three runs, total, across nine innings — and if you've been watching this series with your hand over your eyes, you already knew it was going to come down to one swing, because nothing in either of these lineups suggests it could come down to anything else.

It came down to two. Rafael Devers, who's spent most of June being a storyline instead of a hitter, led off the ninth and tied it with one swing. Then, one out later, a 23-year-old named Victor Bericoto put one over the center-field fence and the building came apart. Final: 2-1. The whole game's offense fit in a single inning.

The expert part — the part I'll own. I called the under on this series Monday (it's on the record; that's the deal here, every number goes up in units and stays up). It cashed. Tuesday it cashed again without me on it, which is the more useful tell: this isn't variance, it's two offenses that genuinely cannot score. The A's — wandering, ballpark-less, playing "road" games an hour from their old home — are getting starting pitching and nothing behind it. The Giants score in spasms. When a team's whole run-production model is "wait for Devers to wake up," the under isn't a take, it's a description. Until one of these lineups proves it can put up a four-spot, I'm not touching an over in this matchup, and I'd look hard at the next under before I'd look at anything else.

The Devers note. The acquisition that was supposed to be the offense delivered the offense the only way this team seems able to receive it: one extraordinary swing in a game that was otherwise a desert. That's not a complaint. A guy who can flip a 1-0 deficit to a tie leading off the ninth is exactly the guy you trade for. But a lineup that needs him to do it because there's nothing else is a lineup with a structural problem, and one homer doesn't fix the structure. File it under "good night, unsolved month."

The amateur part — the rabbit hole. I'll be straight: before tonight I could not have told you a single thing about Victor Bericoto, and I went looking the second the ball landed. Local-ish kid, big raw power, the kind of name Giants fans have been whispering about in the minors while the big club sleepwalks through nine-inning shutouts. I'm not going to pretend I've scouted him — I watched one swing and read for twenty minutes. But that's the fun of a 2-1 game: the offense is so scarce that when it finally arrives, it arrives attached to a name you have to go learn. I'm invested now. That's how this works.

Record's 13-7, +4.89 units on the year, and the single most reliable thing I've found this month is that when these two teams play, you can pencil in three runs and go to bed. No bet here — this one's already final, and there's no Giants game on tonight's board worth a number. Analysis only. But the read travels: the next time the A's and Giants are on the same field, I know exactly which side of the total I'm looking at.