Best MLB Bets Today: MLB Player Props & Odds for Monday, May 12

We're up nearly 20 units through four weeks of MLB betting, so let's keep the momentum going with a handful of picks for Monday's action.

Andrew Brennan

Last updated: May 12, 2025 12:20 PM EDT • 3 min read

Best MLB Bets Today: Player Prop Odds & Picks for May 12 — Pictured: Boston Red Sox designated hitter Rafael Devers hits a home run against the Texas Rangers. Photo by David Butler II via Imagn Images.

We're up nearly 20 units through four weeks, so let's carry that momentum into a new week with our best MLB bets today, headlined by one of the most talked-about players in baseball right now, Rafael Devers.

💰 Best MLB predictions & odds today: May 12

Here are my best MLB predictions and odds today with my pick confidence based on a 1-to-5-star scale. You can also check out our MLB player prop odds tool for the latest MLB odds at the best legal sportsbooks in your region.

🚀 Rafael Devers Over 1.5 total bases (+130 via bet365) ⭐⭐⭐⭐⭐
🚀 Michael Toglia Over 0.5 hits + runs + RBI (-140 via bet365) ⭐⭐⭐⭐
🚀 Alan Trejo Over 0.5 hits + runs + RBI (-115 via bet365) ⭐⭐⭐⭐
🚀 Mickey Moniak Over 0.5 hits + runs + RBI (-135 via bet365) ⭐⭐⭐⭐
🚀 Kyren Paris Over 0.5 hits + runs + RBI (+100 via DraftKings) ⭐⭐⭐⭐⭐

🤑 Best MLB parlay picks

Here is my best MLB parlay for Monday's baseball action; use our parlay calculator to get the best odds for any parlay:

🦵 Rafael Devers Over 1.5 bases (+130)
🦵 Michael Toglia Over 0.5 H+R+RBI (-140)
🦵 Kyren Paris Over 0.5 H+R+RBI (+100)

Parlay odds: +688 via bet365 ($10 to win $68.80)

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🧑‍🏫 Best prop prediction today: MLB expert picks & prop bets

Here's a breakdown of my best prop prediction today. Check out the rest of our MLB picks along with our guide on how to bet on MLB.

⚾ Rafael Devers (Red Sox) Over 1.5 total bases ⭐⭐⭐⭐⭐

Best odds: +130 via bet365 (bet $10 to win $13)

The online chatter about whether Devers should attempt a second positional move in the middle of the season - this time going from DH to first base, a position he has quite literally never played professionally - has become truly exhausting. This comes after everyone and their grandma dunked on the 28-year-old for having a particularly bad first series against the Texas Rangers.

Despite all of that, though, Devers is managing a career-high 146 wRC+, he owns a career-best walk rate, and his Statcast page resembles that of one of baseball's truly elite hitters. It's not just the fans who fail to appreciate Devers, though, as our best sports betting sites continue to price his total bases Over in this +130 territory.

I've made my feelings clear on the Devers "dilemma," and I'm looking for him to continue to silence at least some critics (unfortunately, a lot of people love to be loud and wrong) on Monday with another big performance. Devers smashed a home run yesterday, and he went 4-for-4 the day before.

We featured the third baseman in our best home run predictions today, but this is my favorite bet of the day.

📜 MLB betting record this year

🔥 Last week: 9-9 for +2.11 units
🔥 Overall: 65-63 for +19.36 units

What is a unit❓

Basically, a unit is whatever your standard bet is. So, if you regularly wager $10 on everything you bet, your unit is $10. Therefore, if you tailed every one of my MLB bets so far this season with a $10 unit, you would have profited $193.60 through four weeks.

💵 Best MLB betting sites

Want to bet on baseball? Check out the best MLB betting sites and best sportsbook promos for today's games:

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Written By:
Andrew Brennan

Andrew Brennan is a publishing editor for Sportsbook Review. He also heads the website’s MLB coverage, from the various futures markets to daily picks. Andrew believes a math-based approach is the best way to enjoy long-term success in sports betting, and he’s spent the better part of the last year fine-tuning his own process for MLB, NBA, and NFL picks. Andrew uses eight different sportsbooks to find the best odds available and various projection models to gather as much information as he can. His most used sportsbooks are bet365, FanDuel, and theScore Bet. When it comes to daily projection models, he regularly references NumberFire across all sports, as it’s one of the best free tools available. In terms of which daily markets Andrew attacks, he almost exclusively bets on pitcher strikeouts for baseball. When the winter rolls around, you’ll see him providing more variety when it comes to the NBA (points, assists, rebounds) and NFL (almost any offensive-based player prop). He used these tools to go +150 units in 2023. Andrew is also a passionate fantasy sports player. He’s played fantasy football, fantasy Premier League, and fantasy baseball for the last decade. He graduated from Durham College with his diploma in journalism after earning his degree in law from Carleton University. He’s worked in sports media since early 2017, first contributing at FanSided before moving to theScore. He joined SBR in 2022.