What happened: After going 4-for-5 with two RBIs and a 12th-inning go-ahead solo home run in Game 4, the 22-year-old rookie followed up by going 2-for-3 with two more runs driven in during Game 5.

Why it matters: Entered into the Fall Classic as a postseason wild card, Pratt delivered back-to-back multi-hit, multi-RBI performances in crucial late-series contests. His four-hit showing in Game 4 marked a rare age-22 World Series milestone and carried directly into Game 5.

What to watch: The conclusion of Game 5 determines whether Pratt's two-game offensive surge seals the World Series title or sends the series back for Game 6.