Is Marcus Semien Over 0.5 Hits a good bet today?

PropsBot's AI scores this Marcus Semien hits prop using a Confidence Score (0-100, model agreement) and an Edge Score (gap between modeled probability and sportsbook implied probability). The article above details Marcus Semien's recent form, the matchup against today's opponent, and the best available odds across major sportsbooks. Read the full breakdown before placing any bet.

What is the best hits for Marcus Semien's Over prop?

The article lists current sportsbook odds — typical books include FanDuel, DraftKings, BetMGM, Caesars, Novig (sports exchange), and Hard Rock Bet (Ohio). The best price moves throughout the day; the article reflects the line live at publish time. Always line-shop before placing a bet.

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Marcus Semien Over 0.5 Hits — MLB Picks Today, May 18 (67% AI)

Name: PropsBot.AI
Availability: InStock
Author: David Reilich

By David

Published May 18, 2026

Another high-edge MLB pick today, Monday, May 18, 2026, is Marcus Semien Over 0.5 Hits (NYM @ WAS, 6:46 PM ET). PropsBot’s AI rates the pick at 67.3% Confidence with a 11.1% Edge Score, meaning the modeled probability sits well above the 66% implied by BetMGM’s -190. Best available price: BetMGM -190.

Below is the full breakdown — Confidence Score, Edge Score, sportsbook odds comparison, and historical hit rate data — so you can make a data-backed decision before the 6:46 PM ET first pitch.

Window	Hit Rate	Sportsbook	Line	Odds
L5 / L10 / L20	60% / 60% / 50%	BetMGM	0.5 Hits	-190
Season	53%	BetMGM	0.5 Hits	-190
H2H vs Jake Irvin	50%	BetMGM	0.5 Hits	-190

Is Marcus Semien a good Over 0.5 Hits bet vs Jake Irvin on May 18, 2026?

By David Reilich, Founder of PropsBot.AI · Last updated Monday, May 18, 2026 · Methodology · Editorial standards

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Why Marcus Semien Over 0.5 Hits vs Jake Irvin?

PropsBot’s AI models assigned a 67.3% Confidence Score to Marcus Semien clearing over 0.5 hits in this spot. That number lands in the High Confidence band. Edge Score is 11.1% — the model’s read of how mispriced the BetMGM line is right now. Confidence Gap sits at +1.8%, the spread between PropsBot’s modeled probability and the 66% baked into the market.

Historical Performance at 0.5 Hits

Marcus Semien has cleared over 0.5 hits in 3 of his last 5, 6 of his last 10, and 10 of his last 20. The H2H vs Jake Irvin sits at 50%, and his season mark against this line is 53%. The L5 → L10 → L20 walk-down tells you the recent run is doing the heavy lifting; the season is the regression target.

Matchup Context: NYM @ WAS

Jake Irvin’s a righty starter the Mets see clearly — Semien specifically owns a 50% Over rate H2H. The Mets’ implied team total is 5.8 runs on a 10.0 game O/U, with NYM favored at -1.5. That’s a script where Semien hitting in the top half of the order gets 4+ PAs, and he doesn’t need to do much with them. The 11.1% Edge here is real money on the line — books have him under-priced relative to the model.

Best Line Available

BetMGM’s -190 isn’t pretty juice, but it’s the cleanest price the market is offering on Semien Over 0.5 Hits tonight. Implied probability 66%, model probability 78% — that 12-point gap is the entire +11.1% Edge Score showing on the card.

How PropsBot Grades MLB Hits Picks

Every PropsBot pick is graded the morning after the game by an automated result-tracker that pulls box-score data from MLB.com / NHL.com / NBA.com / NFL.com and marks the pick Hit, Miss, Push, or Voided (for player non-appearance). The graded outcome is appended to the post via a green/red callout block, and the per-pick history is published at Performance Methodology. Every entry includes the date, line, book, and graded outcome — nothing is retroactively edited.

How PropsBot Models MLB Hits Props

Semien’s slash is .229/.249 xBA with 79.2% contact and a .273 BABIP — none of those numbers scream first-overall hitter, but they don’t have to. The job here is one hit. He’s putting bat on ball 4 out of every 5 at-bats and his line-drive rate (22.3%) is actually one of the cleaner peripherals on his stat line. One quality contact in 4-5 PAs is the bar, and he’s clearing it 60% of the time over both L5 and L10. Multiple AI models score the prop, then their consensus is summarized into a single Confidence Score and an Edge Score — full methodology at /performance-methodology/.

More MLB Player Props — May 18, 2026

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Glossary — key terms in this pick

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Sources & Verification

Career stats: Marcus Semien on MLB.com
Advanced metrics: Statcast metrics for Marcus Semien
Game info: New York Mets at Washington Nationals on May 18, 2026

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PropsBot is a research and analytics tool — not a picks service. Picks reflect AI model output as of May 18, 2026 and may be updated; see our Corrections Policy for how we handle changes after publication. Odds are subject to change.

Today’s Other AI Picks — May 18, 2026

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Tagged AI Picks, Hits, Marcus Semien, MLB, MLB Picks Today, Player Props