Mets vs. Red Sox Prediction & Player Props: Expert Picks for May 20

The Red Sox can get back to .500 and capture a series win over the Mets with a victory tonight, but New York will be eager to get back into the win column after recent struggles.

Gabe Henderson

Last Updated: May 20, 2025 9:18 AM EDT • 3 minute read

Mets vs. Red Sox Prediction & Player Props Tonight: Best MLB Odds for May 20 — Pictured: Boston Red Sox designated hitter Rafael Devers (11) hits a walk-off home run against the Atlanta Braves. Photo by Brian Fluharty via Imagn Images.

The New York Mets will meet the Boston Red Sox tonight, with first pitch from Fenway Park in Boston set for 6:45 p.m. ET (TBS). Our Mets vs. Red Sox prediction and player props - part of our MLB picks - highlight our best bets ahead of the star-studded showdown in Beantown.

Read on for our favorite plus-money bonus bet on Rafael Devers at the end of the article.

💰 Best Mets vs. Red Sox predictions & player props

🔎 Our NEW MLB player prop odds tool can help you find the best MLB odds across legal sportsbooks in your area!

✅ Under 9.5 (-135 via ESPN BET) ⭐⭐⭐⭐✅ Clay Holmes Under 5.5 strikeouts (-147 via Caesars) ⭐⭐⭐⭐

🔥 Under 9.5 ⭐⭐⭐⭐⭐

There's only one question bettors need to ask themselves before deciding how to bet each game: Are the Mets involved? If the answer is yes, all of your eggs should go into the "Under" basket.

New York's games have leaned Under at a 62.20% clip (28-17-3) this season. The Mets have managed to combine with their opponents for fewer than 9.5 runs in 80% of their last 10 outings.

Clay Holmes (3.14 ERA) takes the bump tonight, so we feel confident in picking Under 9.5 at juiced odds with our best sports betting apps.

✅ Best bet: -135 via ESPN BET (bet $10 to win $7.41 profit)

Each product featured on our website has been meticulously researched and selected by our team of experts. If you sign up through our links, we may get a commission.

⚾️ Clay Holmes Under 5.5 strikeouts ⭐⭐⭐⭐

Holmes has transitioned into a starting role seamlessly, just as the Mets had hoped the former Yankees reliever would when they signed him in the offseason. He's posted three quality starts in his last five outings, but a high strikeout total has been missing.

The 32-year-old has been shakier recently while surrendering eight runs in three starts, including his first three home runs of the season. His strikeout numbers have also dipped, as he's failed to reach six over the last month.

We'll bet on this trend to continue against a Red Sox team that's been striking out at a lower rate recently.

✅ Best bet: -147 via Caesars (bet $10 to win $6.80 profit)

Bet $1, Get Ten 100% Profit Boosts

New users only. Must use promo code. Min. $10 deposit. Max. bonus is ten 100% Profit Boost tokens. Profit Boost tokens expire in 14 days. Void where prohibited. Full terms.

Claim Boosts

Each product featured on our website has been meticulously researched and selected by our team of experts. If you sign up through our links, we may get a commission.

👀 Bonus bet: Rafael Devers Over 1.5 hits ⭐⭐

Devers has been subject to a lot of scrutiny early this season, but he's been channeling his inner Nigel Farage recently. The Red Sox slugger is now hitting .286 and is among the league leaders in RBIs. He's tallied five multi-hit games over his past 10 outings, including three in the last five.

While Devers' career numbers against Holmes don't jump off the page (1-for-5 in six plate appearances), the Mets starter hasn't struck the Dominican out in those duels, so there's some reason for hope. This play is worth a flyer considering how consistent Devers has been at the dish recently.

✅ Best bet: +240 via FanDuel (bet $10 to win $24 profit)

Bet $5, Win $200 in Bonus Bets

New customers only. Min. deposit $5+. Bet $5+ and win $200 in Bonus Bets, if your bet wins (within 72 hours).

Claim $200

Each product featured on our website has been meticulously researched and selected by our team of experts. If you sign up through our links, we may get a commission.

💵 Best MLB betting sites

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

(21+. Gambling Problem? Call 1-800-GAMBLER)
* Bonuses not applicable in Ontario.

Not intended for use in MA.
Each betting site featured on SBR has been meticulously researched and selected by our team of experts. If you sign up through our links, we may get a commission.

Written by:
Gabe Henderson

Gabe Henderson is a sports betting writer from Houston, Texas. He graduated from Louisiana State University in 2022 with a bachelor's degree in Mass Communication. Gabe developed an interest in sports betting while in college due to its legalization in Louisiana. He turned his passion into a career shortly after, joining The Advocate/NOLA.com as a Sports Betting Content Coordinator, where he spent two years. Gabe wore many hats before graduating as he led FanSided's coverage of Chelsea FC as a Site Expert with "The Pride of London." He was also the Editor-in-Chief of the LSU Gumbo Yearbook for two years. Gabe became a part of the SportsbookReview.com team in late 2024. He brings with him an extensive knowledge of many sports, including — but not limited to — NFL, NCAA, MLB, NBA, soccer, and UFC.