№ 01Gunnar Henderson is 8-for-18 (.444) with 1 home run across 19 career plate appearances against George Kirby.
№ 02George Kirby throws 54.6% fastballs and Gunnar Henderson carries a .343 xwOBA against fastballs across 181 plate appearances this season.
№ 03Against right-handed sinkers this year, Gunnar Henderson is slugging .500 over 38 plate appearances.
№ 04Gunnar Henderson is also running a 20.0% barrel rate against right-handed cutters in 19 plate appearances, fitting the extra-base angle.
№ 05If the opposing closer enters late, his 5.68 ERA across 25.3 relief innings leaves another lane for a knock.
§ 01The analysis
This price is built around a matchup edge, not season form. Gunnar Henderson is hitting .224 with a 0.71 OPS on the year and just .229 against right-handed pitching, with a 0.69 OPS across 241 plate appearances versus righties. Over his last 10 games he has 10 hits in 36 at-bats. None of that screams extra bases at +145. The case is George Kirby specifically. Gunnar Henderson is 8-for-18 with a home run in their 19 career meetings, and the pitch mix plays into his hands - 54.6% fastballs against a hitter with a .343 xwOBA on fastballs over 181 PA, a .500 slug against right-handed sinkers, and a 20.0% barrel rate against right-handed cutters. George Kirby's 4.07 ERA is real, and his 3.33 FIP suggests the underlying stuff is sharper than the surface line. The venue is the harder counter. T-Mobile Park carries a 0.83 run environment and wind is blowing in toward home at 9 mph, which trims the home-run path even with a 0.96 HR factor for left-handed hitters. The doubles and gap-shot route still plays.
§ 02The call
At +145, you are paid for a matchup, not a hot streak. Gunnar Henderson's career line against George Kirby is the cleanest data point in this package, and George Kirby's fastball-heavy mix runs straight into Gunnar Henderson's best contact profile against right-handed fastballs, sinkers, and cutters. The park and wind cap the ceiling, but two singles or a double clears the number, and a late-inning at-bat against a 5.68 ERA closer adds one more shot. Take Gunnar Henderson over 1.5 total bases.
Final resultWINGunnar Henderson OVER 1.5 Total Bases · +145 Graded Jun 18, 2026