Beltway Series
| Teams |
|
|---|---|
| First meeting | May 19, 2006 Robert F. Kennedy Memorial Stadium, Washington, D.C. |
| Latest meeting | May 10, 2017 Nationals Park, Washington, D.C. Nationals 7, Orioles 6 |
| Next meeting | June 8, 2017 Nationals Park, Washington, D.C. |
| Statistics | |
| Meetings total | 63 |
| Regular season series | Orioles, 38–25 (.603) |
| Largest victory | Nationals, 17–5 (May 20, 2011) |
| Longest win streak |
|
| Current win streak | Nationals 1 (May 10, 2017) |
The Beltway Series, promoted by the teams as "The Battle of the Beltways," is the Major League Baseball (MLB) interleague rivalry series played between the Baltimore Orioles and Washington Nationals. The Orioles are a member of the American League (AL) East division, and the Nationals are a member of the National League (NL) East division. The series name is taken from the beltway highways, the Baltimore Beltway (I-695) and the Capital Beltway (I-95/I-495), that serve Baltimore, Maryland, and Washington, D.C., respectively.
When interleague play began in 1997, MLB identified the Philadelphia Phillies as Baltimore′s interleague "natural rival," and the Orioles began an annual interleague series against the Phillies that season. At the time, the franchise that would become the Washington Nationals played in Montreal as the Montreal Expos, and the Expos played the Toronto Blue Jays as their interleague "natural rival" each year from 1997 to 2004 in what became known as the All-Canadian Series. The Orioles and Expos met one another in routine interleague play – without any connotation of a "rivalry" or other special association between the teams – during the 1998, 1999, 2000, and 2001 seasons, and Montreal won seven of the 12 meetings, but the Orioles and Expos did not play one another again after the 2001 season.
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