What happened: Don Mattingly credited Andrew Painter's season-long growth after the rookie worked out of the bullpen for the win. Bryce Harper tied the game with an eighth-inning home run while Kyle Schwarber contributed to the comeback.

Why it matters: Late-September wins test rookie leverage options before the postseason field sets. Veteran production behind a rookie winner stabilizes the late-inning lineup mix.

What to watch: Watch Painter's next relief appearance and the late-inning order in the finale.