Strasburg has dominated in his last four outings against the Marlins, going 4-0 with a 0.67 ERA dating back to April 2017. His last start (seven innings, one run, nine strikeouts) was his best since returning from the DL last month.
Alcantara has just three Major League starts under his belt, but he's looked far more experienced than that in September. In two seven-inning starts this month, he's allowed just two earned runs and struck out 12.