Giants left-hander Madison Bumgarner experienced a few firsts in his last start against the Rockies. However, they were ones he'd rather forget.
Bumgarner surrendered nine runs to Colorado, exceeding his previous career high of eight on June 21, 2011, against the Twins. He also allowed his first Major League grand slam.
That major mistake with two outs in the fifth inning chased Bumgarner from the game, marking his shortest outing of the season. In all, the left-hander allowed nine runs (seven earned) on eight hits for the loss.
"I was going to give him a chance at one more hitter and it backfired, obviously," manager Bruce Bochy said after the game. "Sure, those are tough calls. But with those runners out there, his runners, I was going to give him a chance to get out of it."
Bumgarner will look to get back on track Wednesday when the Giants face the Nationals at AT&T Park.
However, that could be difficult for Bumgarner with Gio Gonzalez on the hill for Washington.
Gonzalez has tossed quality starts in all three of his outings in May, combining to allow just five runs in 19 2/3 innings.
While the left-hander labored through the first two frames of his last start against the Padres by throwing 45 pitches, Gonzalez finished strong by allowing just three runs on six hits in 6 2/3 innings for the no-decision.
Nationals: Harper moves back to second spot in lineup
Bryce Harper was the No. 2 hitter for Tuesday's game against the Giants, the first time he'd hit in that spot this season.
Besides one pinch-hit at-bat as the ninth-place hitter, Harper has been exclusively used as Washington's No. 3 hitter this year.
Manager Davey Johnson said he got inspiration to change the lineup after talking to Harper and leadoff man Denard Span about the idea Monday.
Harper finished the game going 0-for-2 with a walk and two sacrifice bunts.
Giants: Vogelsong and Casilla to DL
San Francisco starter Ryan Vogelsong and reliever Santiago Casilla were placed on the disabled list Tuesday. First baseman Brett Pill and right-hander Sandy Rosario were recalled from Triple-A Fresno to fill the roster openings.
Vogelsong sustained two fractures and a dislocated joint in his right pinkie when he was hit by a pitch from Washington's Craig Stammen on Monday night. Vogelsong is expected to miss six to eight weeks after having surgery Tuesday.
Casilla pitched a scoreless eighth inning in Monday night's 8-0 victory over Washington, but aggravated a right knee injury caused by a cyst.
• Former All-Star Bob Boone and front-office executive Johnny DiPuglia will represent the Nationals at the upcoming 2013 MLB First-Year Player Draft. The Giants will be represented by former No. 2 overall pick Will Clark and senior advisor of baseball operations Tony Siegle.
• The Giants have lost 11 of their last 19 games to the Nationals, dating back to 2010.
Quinn Roberts is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.