This is a matchup of previously unheralded pitchers who will be making their postseason debuts as starters. When Hill has pitched this season, he has almost always pitched well. But he has pitched only 19 times because of recurring blisters. In six starts for the Dodgers, he has maxed out at 93 pitches. Roark, a 30-year-old right-hander axed from the Nationals’ star-studded rotation last season after his breakout 2014, did not miss a start in a triumphant return. He relies on stellar control and steady sinkers. Washington won 20 of the 33 games he started, but lost his lone outing against the Dodgers in June. Hill nearly made the Nationals as the last man in the bullpen out of spring training in 2015, then was relegated to Triple A. He gave up after 10 weeks, leaving the Washington organization and remaking himself as a starter on the game’s lower rungs of competition. In 24 starts since, he has not given up more than four runs, and has held opponents to no more than one run on 12 occasions.