Harper (knee) is starting in center field and batting fourth against the Reds on Sunday, Chelsea Janes of The Washington Post reports.
Harper exited Saturday's game after being hit by a pitch on the knee cap and was unsure of his availability for the series finale. The 25-year-old is apparently feeling fine after the scary moment Saturday, and he has four hits -- including a double and a home run -- and three walks through 13 plate appearances in the series thus far.