Mariners vs Cubs MLB Player Prop Picks (Jun 21)

The 37–36 Mariners visit the 45–30 Cubs, aiming to snap a two-game skid, while Chicago looks to build on its dominant home form. The Cubs are favored in a series where they’ve historically dominated Seattle, both overall and at Wrigley Field. First pitch is  2:20 p.m. ET at Wrigley Field.

• Seattle starts Emerson Hancock (3–2, 4.48 ERA, 45 K) off his best outing, while Chicago counters with Cade Horton (3–1, 3.47 ERA, 29 K) following a 5⅔-shutout relief appearance.
• The Cubs own a .680 winning percentage against Seattle overall and a .727 mark at Wrigley.
• The over/under is set at 12 runs, with trends leaning toward the under in this pitcher-friendly matchup.

Seattle Mariners Player Prop Pick: Emerson Hancock

Despite a slow stretch, Seattle remains contenders in the AL West, anchored by Cal Raleigh’s 29 home runs. The lineup struggles with consistency and ranks mid-pack in strikeouts. Their pitching relies on young arms—Hancock, Kirby, Gilbert—with mixed results.

• Hancock allowed 0 runs in his last start and has yielded two or fewer in four of six outings.
• His 4.48 ERA masks his control improvements and consistent innings.
• The under carries value in a matchup where he likely faces 5+ innings with limited damage.

Chicago Cubs Player Prop Pick: Cade Horton

The Cubs have surged at home behind a powerful offense led by Pete Crow-Armstrong (20 HR) and Seiya Suzuki (61 RBI). Their pitching—bolstered by Horton and a stable bullpen—has made Wrigley a difficult venue for opponents.

• Horton averages approximately 7.2 K/9 and recorded 5 strikeouts in his most recent relief appearance.
• Seattle ranks in the bottom half of MLB in team strikeout rate.
• Horton’s high strikeout ceiling makes this a well-aligned projection.