Player Predictions for Red Sox vs Royals – May 20, 2026

Boston Red Sox

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Kansas City Royals

Boston Red Sox Insights

• Boston Red Sox – Moneyline (-105)
  The Boston Red Sox outfield defense profiles as the best among every team today.
  Explain: Defense is an integral part of preventing hits and runs.
• Isiah Kiner-Falefa – Over/Under 0.5 Total Bases (-150/+115)
  Isiah Kiner-Falefa’s average exit velocity has declined this year; his 84.6-mph mark last year has fallen off to 81.4-mph.
  Explain: Hitting the ball hard increases the chances of either a home run or the ball landing in fair territory for a hit before a fielder can get to it.
• Carlos Narvaez – Over/Under 0.5 Total Bases (-135/+105)
  Carlos Narvaez has a 94th percentile opposite-field rate on his flyballs (37%) and has the misfortune of hitting them in the direction of the league’s deepest RF fences in today’s matchup.
  Explain: This player’s skill set does not match up particularly well with the park he’s in today, which may lead to worse-than-usual performance.

Kansas City Royals Insights

• Michael Wacha – Over/Under 17.5 Pitching Outs (-150/+120)
  Michael Wacha has averaged 19.1 outs per game per started this year, placing in the 99th percentile.
  Explain: A pitcher who averages more outs per start than his Outs prop may be a good bet to go over, and visa-versa for the under.
• The Kansas City Royals have been the 10th-unluckiest offense in MLB this year, according to the leading projection system (THE BAT X), and are likely to hit better the rest of the season
  Explain: When teams underperform their projected talent level, markets may undervalue them even while they are likely to perform better in the near future.

Betting Trends

• Kansas City Royals – Over/Under 3.5 Team Total (-130/+100)
  The Kansas City Royals have hit the Team Total Under in 7 of their last 9 games (+4.95 Units / 44% ROI)
• Boston Red Sox – Over/Under 3.5 Team Total (-125/-105)
  The Boston Red Sox have hit the Team Total Under in 16 of their last 23 games (+7.75 Units / 28% ROI)
• Marcelo Mayer – Over/Under 0.5 Runs (+180/-235)
  Marcelo Mayer has hit the Runs Under in 20 of his last 25 games (+8.80 Units / 17% ROI)