WASHINGTON -- Thanks to a persistent rainstorm Tuesday night, the budding Orioles-Nationals rivalry has been moved 50 miles up the road, but it will make a return appearance to the nation’s capital in August.

Tuesday’s finale of a two-game series at Nationals Park was postponed after a two-hour, 30-minute rain delay. It will be made up Aug. 4 in Washington — no time for that game has been announced yet.

According to Nationals manager Matt Williams, a day-night doubleheader in Washington and Baltimore this week was never in consideration because both teams have the common day off in the Baltimore-Washington area in August.

The two teams will continue their interleague play for another two-game series starting Wednesday at 7:05 p.m. at Camden Yards.

Orioles’ right-hander Bud Norris, who was supposed to pitch Tuesday, will start Wednesday against Washington’s Doug Fister, who was also Tuesday’s scheduled starter.

Orioles left-hander Wei-Yin Chen, who was scheduled to start Wednesday, now has been pushed back to Thursday. The Orioles are expected to push all of their starters back one game until the All Star break.

Washington right-hander Tanner Roark, who was supposed to start Wednesday, will not face the Orioles this week. He’ll be pushed back to Sunday against the Philadelphia Phillies. Instead, left-hander Gio Gonzalez will stay on turn and pitch Thursday against the Orioles as scheduled.

And then, in August, the Orioles will lose a day off for another trip down Interstate 95.

The Orioles originally were idle Aug. 4 before they were set to embark on a three-game road trip that begins Aug. 5 against the Toronto Blue Jays at Rogers Centre. The Nationals are off Aug. 4 in the middle of a seven-game homestand.

The Orioles’ abbreviated road trip this week to Boston and Washington ends with a 3-1 record. They remain a season-high nine games over .500 for the first time this season.

Tuesday’s postponement is the Orioles’ fifth this season. The other four — three at home and one other on the road — have already been made up.

dan.connolly@baltsun.com

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