№ 01Heim is punishing lefties for a 1.01 OPS across 74 plate appearances this year, exactly the split this matchup asks him to lean on.
№ 02Skubal leans on his fastball 55.5% of the time and Heim owns a .350 xwOBA against heaters across 97 plate appearances.
№ 03Backing up the split OPS, Heim is hitting .294 off left-handed pitching this season, so contact quality is holding up.
№ 04If the game tightens late, Kenley Jansen has coughed up a 4.98 ERA across 21.7 relief innings, leaving extra bases on the table.
№ 05First-pitch temperature at Comerica Park is 85°F, and warmer air helps balls travel.
§ 01The analysis
The lead here is Heim's work against left-handed pitching. He's carrying a 1.01 OPS in 74 plate appearances off lefties this season, and the underlying .294 average against them says the split isn't a small-sample mirage. The matchup fits the pitch mix too. Skubal is a 55.5% fastball guy, and Heim has posted a .350 xwOBA against fastballs across 97 plate appearances this year. If the game runs long, Kenley Jansen is sitting on a 4.98 ERA over 21.7 relief innings, so late-inning bases are on the menu. First-pitch temperature is 85°F at Comerica Park, and warmer air carries. The counter is real and it starts with the arm on the mound. Skubal owns a 3.26 xERA over 65.7 innings and a 2.96 FIP, and his swinging-strike and strikeout rates are running ahead of his own baseline this year. The career book between them is thin and unkind: Heim is 3-for-18 against Skubal in 19 plate appearances, though one of those hits left the yard. Heim's .198 xwOBA against left-handed sliders in 10 plate appearances is another wrinkle worth flagging.
§ 02The call
The price at -149 is paying for the platoon edge, the fastball-heavy pitch mix, and a warm night with a leaky closer waiting in the pen. Skubal's 3.26 xERA and rising whiff rate are the honest reason this isn't shorter, and the 3-for-18 head-to-head sample doesn't help. But Heim's 1.01 OPS versus lefties and .350 xwOBA on fastballs are the numbers doing the heavy lifting, and one hit or one extra-base knock cashes the ticket.
Final resultWINJonah Heim OVER 0.5 Total Bases · -149 Graded Jul 8, 2026