Player Props Analysis for Mariners vs Nationals – Saturday June 13th, 2026

Seattle Mariners

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Washington Nationals

Seattle Mariners Insights

• Luis Castillo – Over/Under 15.5 Pitching Outs (-130/+100)
  Luis Castillo has been granted more leash than the typical pitcher this year, tallying 6.1 more adjusted pitches-per-game than the average starting pitcher.
  Explain: Pitchers with a longer leash are more likely to go deeper into games and record more outs.
• Luke Raley – Over/Under 1.5 Total Bases (+145/-185)
  Luke Raley’s average exit velocity has dropped off recently; his 90-mph seasonal EV has fallen to 80.8-mph in the last two weeks.
  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.
• Seattle Mariners hitters jointly grade out 10th- in MLB for power this year when using their 8.8% Barrel%.
  Explain: Barrel% measures how often a player hits the ball at the optimal exit velocity and launch angle and is a terrific measure of underlying power.

Washington Nationals Insights

• Cade Cavalli – Over/Under 5.5 Strikeouts (+115/-145)
  Given the 1.04 disparity between Cade Cavalli’s 9.82 K/9 and his 8.78 estimated true talent K/9 (via the leading projection system, THE BAT), it’s safe to say he’s been one of the most fortunate pitchers in baseball this year in terms of strikeouts and ought to see negative regression the rest of the season.
  Explain: Pitchers that are overperforming should be expected to pitch worse going forward, which can create value on K prop Unders if the lines are too heavily weighing the lucky, to-date overperformance.
• Keibert Ruiz – Over/Under 0.5 Total Bases (-175/+135)
  In terms of his home runs, Keibert Ruiz has had some very good luck since the start of last season. His 10.3 HR per 600 plate appearances mark has been a fair amount higher than the leading projection system (THE BAT X)’s version of Statcast-based Expected HR/600 at 0.9.
  Explain: xHR uses highly advanced Statcast data to measure a player’s home run ability more accurately than actual home runs can.
• James Wood – Over/Under 1.5 Total Bases (+110/-145)
  James Wood has a 99th percentile opposite-field rate on his flyballs (41.3%) and is a great match for the park considering he’ll be hitting them in the direction of the game’s 11th-shallowest LF fences in today’s matchup.
  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.