Read the Boxscore for Cubs vs Mariners - Friday August 21st, 2026

-110O/U: 7.5
(-115/-105)-110

Ian Happ – Over/Under 0.5 Total Bases (-135/+105)
The switch-hitting Ian Happ will get to bat from his better side (0) today against Emerson Hancock.
Explain: Right-handed hitters perform better against left-handed pitchers (and visa-versa). This can have a huge impact on whether a hitter will perform well or struggle on any given day.
Chicago Cubs – 2H Moneyline
The Chicago Cubs bullpen projects as the 8th-worst in Major League Baseball, via the leading projection system (THE BAT).
Explain: Most bettors only consider the starting pitcher, but a weak bullpen sneakily creates an easier matchup for the opposing offense and boosts a game’s runs.

Cal Raleigh – Over/Under 0.5 Total Bases (-130/+100)
Cal Raleigh pulls a lot of his flyballs (43.4% — 100th percentile) and will have a big advantage hitting them towards MLB’s 9th-shallowest LF fences today.
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.

Seattle Mariners – Over/Under 1.5 1st Five Innings (F5) Team Total (-155/+120)
The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Under in 6 of their last 8 games at home (+4.40 Units / 48% ROI)
Chicago Cubs – Run Line -1.0 (+125)
The Chicago Cubs have hit the Run Line in 13 of their last 18 away games (+9.55 Units / 45% ROI)
Josh Naylor – Over/Under 0.5 Total Bases (-180/+140)
Josh Naylor has hit the Total Bases Over in 17 of his last 25 games (+9.10 Units / 25% ROI)

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