Best MLB RBIs Matchups — Saturday, September 12, 2026
Top rbis spot: Pete Alonso
Pete Alonso (BAL) tops the board at 100, facing RHP Spencer Miles. The righty is driving in runs at .166 RBI/PA against righties this year — and .114 over the last two weeks, an excellent bat that turns into a RBI in about 16% of his trips. And Spencer Miles has been stingy with runs against righties lately — .000 RBIs per batter faced. One catch: the bullpen behind him has been stingy to that side late. He's hitting in a spot worth about 4.5 trips, so the volume's there. He's owned Spencer Miles too — .667 across 3 career trips. It all sets up in a neutral park.
The rest of the top of the board
- Kyle Schwarber (PHI) (89) vs RHP Tyler Mahle: an excellent bat at .144 into an arm stingy with runs against the same side (.059), due to bounce back.
- Jo Adell (CLE) (88) vs LHP Connor Prielipp: an excellent bat at .149 into an arm stingy with runs against the same side (.000).
- Junior Caminero (TB) (85) vs RHP Peter Lambert: an excellent bat at .144 into an arm getting lit up by the same side (.167).
- Sal Stewart (CIN) (84) vs RHP the starter: an excellent bat at .144 into an arm with little track record against the same side.
- Drake Baldwin (ATL) (83) vs RHP the starter: a strong bat at .135 into an arm with little track record against the same side.
- Max Muncy (LAD) (82) vs RHP Tyler Phillips: a strong bat at .139 into an arm mostly holding up against the same side (.100), hot bat.
- Riley Greene (DET) (82) vs RHP Tanner Gordon: a strong bat at .137 into an arm getting lit up by the same side (.160).
Platoon edges to target
- Kyle Schwarber (PHI) — lefty bat vs RHP, .146 against righties this year.
- Jo Adell (CLE) — righty bat vs LHP, .242 against lefties this year.
- Max Muncy (LAD) — lefty bat vs RHP, .143 against righties this year.
- Riley Greene (DET) — lefty bat vs RHP, .127 against righties this year.
- Brice Turang (MIL) — lefty bat vs RHP, .159 against righties this year.
Lineup watch
270 of today's hitters are still on projected lineups, drawn from each team's last game. Batting order drives the score, so these flip the moment official lineups post — usually about two hours before first pitch. Anyone who doesn't make the official card gets flagged "Not starting" and drops to the bottom.
How to read these rbis matchups
Each score (0–100) starts with the hitter's RBIs per plate appearance against the hand he's facing — weighted toward the last two weeks, then the season, then a two-year baseline. Then it layers in the bullpen, his spot in the order, and park and weather. Higher means more of it points his way. It's context, not a lock — a great spot still goes 0-for-4 sometimes, and a tough one runs into one. The edge is in stacking the odds, and since we grade every board, you can see how often the top of the list delivers.
What the RBIs board is
The RBIs board projects the chance a hitter drives in a run, given his slot and the bats around him. One statistical model scores every matchup on the slate the same way — a star and a backup judged on the matchup in front of them, not their name — and every number is graded against the real box score once the games go final.
How the model gets its number
It isn't a gut call or a name game. The projection is built from a few things:
- His run-driving rate.
- How often the hitters ahead of him are on base.
- The arm he faces and the park.
Those pieces combine into one number, and the model re-tunes itself weekly against how its past calls actually landed.
Is there a betting edge here?
RBIs is lumpy — runs cluster — and once you price the 1+ line with a clustering-aware model instead of a naive one, the apparent edge vanishes. It grades efficient. So this is a transparency board.
How to use it
Good for spotting the cleanup-spot smash setups; not a market we've found a bettable edge in.
Everything here is a research signal from the model, graded in public — not betting advice, and no outcome is guaranteed.
Learn more: How the model works · The picks story · Today's plays