Check Out the Top Player Prop Picks for Giants vs Red Sox - Friday, August 21, 2026

+155O/U: 7.5
(-110/-110)-180

San Francisco Giants – Moneyline (+155)
Among all the teams on the slate today, the 3rd-weakest infield defense is that of the the San Francisco Giants.
Explain: Defense is an integral part of preventing (or, in this case, allowing) hits and runs.
Rafael Devers – Over/Under 1.5 Total Bases (+140/-185)
Rafael Devers has an 87th percentile opposite-field rate on his flyballs (35.1%) and will have a big advantage hitting them towards the game’s shallowest LF fences in today’s game.
Explain: This player’s skill set matches up particularly well with the park he’s in today, which may lead to better-than-usual performance.

Sonny Gray – Over/Under 18.5 Pitching Outs (+110/-140)
The leading projection system (THE BAT X) forecasts that Sonny Gray will surrender an average of 1.4 singles in today’s outing.
Explain: THE BAT X is a highly sophisticated projection system that accounts for a multitude of factors like ballpark, weather, umpire, and more.
Andruw Monasterio – Over/Under 0.5 Total Bases (-180/+140)
Extreme flyball bats like Andruw Monasterio tend to perform better against extreme groundball pitchers like Logan Webb.
Explain: This mostly has to do with the way the hitter’s swing plane interacts with the pitch trajectory, and it can create boosted performance across all categories and hidden value few are considering.

Boston Red Sox – Over/Under 1.5 1st Five Innings (F5) Team Total (-160/+125)
The Boston Red Sox have hit the 1st Five Innings (F5) Team Total Over in 14 of their last 18 games at home (+9.90 Units / 46% ROI)
San Francisco Giants – Over/Under 3.5 Team Total (+115/-150)
The San Francisco Giants have hit the Team Total Under in 27 of their last 45 away games (+7.05 Units / 14% ROI)
Sonny Gray – Over/Under 1.5 Earned Runs (-155/+120)
Sonny Gray has hit the Earned Runs Under in 17 of his last 25 games (+8.30 Units / 26% ROI)

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