The Washington Nationals have a chance to regain first place in the NL East with a victory over Baltimore combined with an Atlanta Braves loss to the Tampa Bay Rays.
The Nationals dropped a half-game behind the Braves in the division after losing to the Pittsburgh Pirates, 5-3, on Thurday night.
This series marks the first time the Nationals and Orioles have played one another each with a winning record.
The Nationals send Edwin Jackson to the mound. The right-hander is 1-1 with a 3.71 ERA. The Orioles counter with righty Jake Arrieta (2-4, 5.21).