Lake County must win two straight to claim the best-of-three series and advance.
Chase Burnette drove in four runs with three hits, including two home runs to lead Lake County's 12-hit attack. Delvi Cid had two hits, two RBI and two stolen bases, Jason Smit and Casey Frawley each had two hits and Adam Abraham hit a solo homer.
Cid and Frawley also hit into double plays while Tyler Holt and Chris Kersten both went 0-for-4 with two strikeouts.
Frawley, whose walkoff homer in June gave the Captains the first-half title in the Eastern Division, came up with two on and one out in the bottom of the ninth and banged into a game-ending double play.
Abraham at third base, Frawley at shortstop and Smit at first base all were charged with errors.
Giovanni Soto had very poor command at the start, walking five and giving up four runs and three hits over 4 1-3 innings. The left-hander wasn't the worst of four Captains pitchers, all of whom allowed runs.
Normally reliable Francisco Jimenez gave up two hits and two runs (one earned) over 1 2-3 innings; Takafumi Nakamura did his Masahide Kobayashi impersonation by yielding a walk, two hits and two runs without getting anybody out, and Jeremy Johnson worked three good innings, but still allowed two hits and two runs, both unearned.