Chicago Cubs' Starlin Castro, left, is safe at first avoiding the tag of Washington Nationals first basemanTyler Moore on a high throw by third baseman Ryan Zimmerman during the sixth inning.
Denard Span scored the go-ahead run on pinch-hitter Chad Tracy's grounder in the 13th inning, and the Washington Nationals beat the Chicago Cubs 5-4 on Thursday after Stephen Strasburg blew a three-run lead in the ninth.
Span doubled leading off the 13th against Michael Bowden (1-3). He moved up on a sacrifice bunt by Steve Lombardozzi and came around on Tracy's roller to the first-base side of the mound.
That made a winner of Craig Stammen (7-5), who worked two innings.
Drew Storen earned his third save in eight chances. Storen deflected Dioner Navarro's liner toward Lombardozzi to start a game-ending double play after Anthony Rizzo reached on a throwing error by the second baseman with one out.
After a two-hour rain delay at the start, Strasburg was one out away from a complete game with a 4-1 lead before Chicago rallied to tie it.
Junior Lake had an RBI single, and Donnie Murphy hit a two-run homer to make it 4-4. Rafael Soriano gave up a double to Brian Bogusevic before Darwin Barney lined to left, sending the game to extra innings.
Before the late rally, Strasburg and the Nationals were sailing along.
Ryan Zimmerman and Steve Lombardozzi homered, and Strasburg added two hits, including an RBI single, as Washington built a 4-0 lead.
Strasburg was aiming for his second shutout in three starts when Chicago's Brian Bogusevic homered leading off the eighth. When the Cubs struck again in the ninth, Chicago spoiled the ace's dominant outing.
Strasburg gave up seven hits, struck out eight and walked two after the shortest start of his career. He was ejected in the second inning at Atlanta last week for throwing two consecutive pitches behind Andrelton Simmons' back.
Travis Wood allowed four runs and seven hits in 6 2-3 innings for Chicago.