WASHINGTON -- Nationals pitcher Stephen Strasburg has spent time on the disabled list during each of the past three seasons.
The Nats are hoping he doesn't make it four in a row.
Strasberg exited after two innings because of tightness in his right shoulder, and the San Francisco Giants rapped eight extra-base hits to beat Washington 9-5 Friday night.
"His shoulder tightened up on him. He's got a little bit of inflammation," manager Dave Martinez said. "He's getting an MRI tomorrow, so we'll know a lot more."
Strasburg said he's been dealing with the issue prior to Friday.
"You're not going to feel 100 percent every time, but I think it's just been something that's been a gradual process and it's been affecting me more and more over the last three or four starts," Strasburg said, "and it's a tough one to gauge because you want to go out there and do your part."
"Today it acted up on me a little bit more than the other ones and Davey decided to pull the plug," he said.
The 29-year-old Strasburg has been excellent when healthy, going 15-4 in both of the two past season. But he hasn't made 30 starts in a year since 2014 when he made 34.
Strasburg has made five trips to the disabled list since 2015.
Neither Martinez or Strasburg were forecasting the MRI result.
"Hopefully, it's nothing at all," Martinez said. "Just a little tightness, a little inflammation, we can take care of it and then we'll go from there."
Strasburg (6-6) gave up three runs and five hits.
"Anything can happen in a one-run game," Giants manager Bruce Bochy said. "It's always nice to have a cushion and the guys gave us that and it allows you to do some things."
McCutchen's solo home run in the first inning was his third in five games and he later singled. He entered the game 3 for 22 against Strasburg.
Reyes Moronta (2-0) got two outs for the win.
Staked to the early lead, Giants rookie Andrew Suarez couldn't finish the fifth and was lifted in favor of Moronta after Harper's hit. Suarez allowed four runs on six hits in his ninth start.
Matt Adams' pinch-hit single in the sixth pulled Washington within 6-5.
In the second inning, the first four Giants went double-single-double-single off Strasburg, with Alen Hanson and Pence driving in runs.
THE CUP IS COMING
The Stanley Cup Champion Washington Capitals, along with the Cup, will be at Nationals Park on Saturday. The team will be introduced prior to the game and Capitals captain and Conn Smythe-winner Alex Ovechkin will throw out the ceremonial first pitch.
Giants: RHP Johnny Cueto (right elbow inflammation) and RHP Jeff Samardzija (right shoulder tightness) threw bullpen sessions. Bochy said Samardzija will throw one more bullpen and then throw to hitters or make a rehab start. Cueto said he would like to throw two more bullpens and then a batting practice.
Nationals: OF Adam Eaton (left ankle surgery) is close to being activated. He went through a full pregame workout with the team and could be in Saturday's lineup. ... 2B Daniel Murphy (right knee surgery) continues his rehab assignment at Double-A Harrisburg. "We want to get him comfortable playing maybe three or four games in a row, so we'll just see," Martinez said.
Giants: Rookie RHP Dereck Rodriguez (1-0, 1.93) makes his second major league start. Rodriguez is the son of Hall of Fame catcher Ivan Rodriguez, who finished his playing career with the Nationals.
Nationals: LHP Gio Gonzalez (6-2, 2.27) is 5-5 with a 3.21 ERA in 13 career starts against the Giants.
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